 | George Farncomb Wright - 1857 - 98 σελίδες
...value of a half-crown, what would be the ratio of the diameters of such a coin and a halfsovereign? (NB The area of a circle varies as the square of its radius.) ARITHMETICAL PROGRESSION. EXERCISE XXXV. 1. WHEN are quantities said to be in Arithmetical Progression?... | |
 | Robert Fowler - 1861 - 426 σελίδες
...when x = 2, z = 5, state the relation x between x and у in the form of a proportion. 20. Given that the area of a circle varies as the square of its radius, find the ratio between the areas of two circles whose radii are 2 feet and £ a foot respectively.... | |
 | Henry Sinclair Hall, Samuel Ratcliffe Knight - 1885 - 412 σελίδες
...and when x=\, y=4, when я=2, y=8, and when x=3, у = 18, express у in terms of x. 20. Given that the area of a circle varies as the square of its radius, and that the area of a circle is 154 square feet when the radius is 7 feet ; find the area of a circle... | |
 | George Albert Wentworth - 1890 - 518 σελίδες
...between z x and z if a: = 1, у = 3, when z= £. l z z /. m = — 5 1+3=-^ ' =10 -5 10 Add, 2x =. 5z 8. The area of a circle varies as the square of its...Find the area of a circle whose radius is 20 feet. Let x = the area of a circle of radius r. Then, x = mr2 3.1416 = m .-. x = 3.1416 z2 x = 3.1416X400... | |
 | George Parsons Tibbets - 1892 - 80 σελίδες
...show that a : b : : V3a2 + 5c' 6. Prove that a proportion taken by division is a true proportion. 7. The area of a circle varies as the square of its radius and the area of a circle is 154 sq. ft. when the radius is 7 ft. Find the area of the circle whose radius is 10 ft. 6 in. 8.... | |
 | James Morford Taylor - 1893 - 358 σελίδες
...of x varies as the square of y, and if x = 3 when у = 5 ; find the equation between x and y. 11. If the area of a circle varies as the square of its radius, and if the area of a circle is 154 square feet when the radius is 7 feet ; find the area of a circle whose... | |
 | Matthew Scoby McCurdy - 1894 - 240 σελίδες
...10 feet is 314.159 square feet. Find the area of a circle whose radius is 12 feet, from the law that the area of a circle varies as the square of its radius. 17. From the same law show that the area of a circle 2£ inches in diameter is equal to the sum of... | |
 | Charles Smith - 1894 - 620 σελίδες
...body falls through 144 feet in three seconds. How far does it fall in two seconds ? 12. Given that the area of a circle varies as the square of its radius, show that a circle of 5 feet radius is equal to the sum of a circle of 3 feet radius and another of... | |
 | Henry Sinclair Hall, Samuel Ratcliffe Knight - 1895 - 508 σελίδες
...respectively, and when x=\, y=4, when .37=2, y=S, and when #=3,y = 18, express у in terms of x. 20. Given that the area of a circle varies as the square of its radius, and that the area of a circle is 154 square feut when the radius is 7 feet ; find the area of a circle... | |
 | George Albert Wentworth - 1897 - 386 σελίδες
...— , and x-\-y varies inversely as z , find the relation between x and z if a;=1, y = 3, when z = -. 8. The area of a circle varies as the square of its...9. The volume of a sphere varies as the cube of its radjns, and the volume of a sphere whose radius is 1 foot is 4.1 vi) cubic feet. Find the volume of... | |
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The area of a circle varies as the square of its radius, and the area of a circle whose radius is 1 foot is 3.1416 square feet. 
