238. A garrison of 1500 men has provisions for 12 wks., at the rate of 20 oz. per day to each man. How many men will the same provisions maintain for 20 wks., allowing each man only 8 oz. per day?

239. If 12 candles, of which 8 weigh a pound, serve 4 winter evenings, from five to eleven, how many can

dles, of which 6 weigh a pound, will serve 3 spring evenings, from seven to eleven?

240. A contractor, having engaged to lay 10 mi. of railway in 150 dys., finds that 90 men have finished 3 mi. in 80 dys. How many more men must he engage to finish the work in the given time?

241. If 200 men in 12 dys., of 8 hrs. each, can dig a trench 160 yds. long, 6 yds. wide, and 4 yds. deep, in how many days, of 10 hrs. each, will 90 men dig a trench 450 yds. long, 4 yds. wide, and 3 yds. deep?

242. If 120 men make an embankment of a mile long, 30 yds. wide, and 7 yds. high, in 42 dys., how many men will it take to make an embankment 1000 yds. long, 36 yds. wide, and 22 ft. high, in 30 dys.?

261. How many liters will a box hold which is 75cm long, 15cm wide, and 12cm deep?

262. Add 3.473m, 50cm, 83mm, 4.5m, and 16cm.

263. There are 4 measuring lines: the first is 7.5TM, the second is 3m 75cm, the third is 4m 80cm, and the fourth is 8m 6cm. Express in meters the total length of the four lines.

264. On the same railroad are four stations, between which the consecutive distances are as follows: 7km 249m, 3km 200m, and 5.007km. Find in kilometers the distance between the first and fourth stations.

265. A goldsmith has sold jewels of the following weights respectively 278 9mg, 308 78, 78 408, and 198 3ds 40g 7mg. Find the total weight in grams.

266. From 17km 6m take 243m 691mm.

267. From a farm containing 340ha 7a there are sold 119ha 29.03; how many hektars are left?

268. A liter of mercury weighs 13kg 598. Find the weight in kilograms of 3.69 liters.

269. If 16.94' of olive oil weigh 15 500, find the weight of one liter.

270. Into how many lots of 3.75a may 8ha 40a be divided? 271. If 122.6% of chlorate of potassa yield 48o of oxygen, what weight of oxygen may be obtained from 1kg of the chlorate?

272. A field of wheat containing 81ha has furnished 600 sheaves per hektar; 2 sheaves of wheat have furnished a bundle of straw weighing 5. What will the whole straw bring, at $15 a ton?

273. A farmer shears 620 sheep sheep give on an average 4 lambs of a kilogram each.

and 180 lambs; the

of wool each, and the

The wool is sold for

50 cts. a kilogram. How much money does the farmer receive?

274. A vessel full of water weighs 5.25; the weight of the vessel when empty is 250.

will the vessel hold?

275. Wheat weighs 80s a hektoliter.

How many liters

A field of 4.6ha has

produced 9.2 t. of wheat. If a sheaf of the wheat

on the average gives 4' of grain, find the average number of sheaves produced per hektar.

276. A piece of zinc weighs in the air 343%, and in water 293 only. What is its volume?

277. A piece of zinc weighs in the air 3435, and in water 2938. What is its specific gravity?

278. A jug empty weighs 1.02kg; full of water it weighs 3.8kg. Find the capacity of the jug in liters.

279. The price of 8 casks of olive oil, containing each 9.0511, is $1072. What will be the price of 201?

280. How many hektoliters of wheat, weighing 80ks to the hektoliter, is it necessary to grind to obtain 15 bags of flour, weighing 159s a bag, if the wheat furnishes in flour of its own weight?

MENSURATION.

281. What is the total surface of a cube, the edge of which measures 41⁄2 in.?

282. How many planks, each 15 ft. long and 10 in. wide, will be required for the flooring of a room 30 ft. in length and 22 ft. in width?

283. A square court, whose side is 42 yds., is paved with. 28,224 square tiles. Find the dimensions of each tile.

284. Find the area of a triangle whose base is 9 ft. 8 in., and whose altitude is 5 ft. 3 in.

285. How many yards of carpeting, 1 yd. wide, will be required for a room 27 ft. long, and 21 ft. 3 in. wide, if the strips run across the room?

286. How many yards in the side of a square field containing 3 A. 44 sq. rds. 25 sq. yds.?

287. The longest diagonal of a quadrilateral is 49 yds., and the perpendiculars let fall on it from the remaining angles are 9 ft. 6 in. and 13 ft. 10 in. Find the area.

288. The parallel sides of a trapezoid

and the altitude is 9 ft. 8 in.

are 19 and 23 ft.,

Find the area.

289. How many cubic feet in a piece of timber 18 ft. long,

15 in. wide, and 10 in. thick?

290. The sides of a triangular garden are 52, 64, and 72 yds. respectively. Find the area. /614.20

291. Find the circumference and area of a circle whose radius is 2 ft. 4 in.

292. Find the length of an arc of 72° in a circle whose diameter is 56 ft.

293. The side of an equilateral triangle is 12 ft. Find its

area.

294. How many bricks, each 9 in. long, 4 in. wide, and 3 in. thick, will be required for a wall 175 yds. long, 12 ft. high, and 1 ft. 10 in. thick?

295. How many square yards of paper will cover the walls of a room 22 ft. 10 in. long, 17 ft. 8 in. wide, and 10 ft. 4 in. high?

296. What will be the cost of painting 12 circular pillars, each 38 in. in circumference, and 13 ft. 6 in. high, at 13 cts. a square yard?

297. Find the volume of a cylindrical marble column whose diameter is 16 in., and whose height is 13 ft. 8 in.

298. The long and short diameters of an ellipse are 25 ft. and 18 ft. respectively. Find the area.

299. How many diamond-shaped panes of glass, whose diagonals measure 6 in. and 4 in., will be required for a window 74 ft. high and 44 ft. wide? 300. The diameter of a circular shaft in a railway tunnel is 5 ft. and its depth 30 fathoms. How many cubic ft. of earth were dug out in making it?

301. How many yards of paper, 22 in. wide, will be required to cover the walls of a room that is 23 yds. 2 ft. 6 in. in circuit, and 9 ft. 9 in. in height?