| George Farncomb Wright - 1857
...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
...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 - Algebra - 1885 - 412 pages
...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 - Algebra - 1890 - 522 pages
...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 radius,** and the area of a circle whose radius is 1 foot is 3.1416 square feet. Find the area of a circle whose... | |
| George Parsons Tibbets - Algebra - 1892 - 80 pages
...a:b::c:d 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... | |
| James Morford Taylor - Algebra - 1893 - 358 pages
...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... | |
| Charles Smith - Algebra - 1894 - 620 pages
...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... | |
| Matthew Scoby McCurdy - 1894 - 173 pages
...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... | |
| Henry Sinclair Hall, Samuel Ratcliffe Knight - Algebra - 1895 - 508 pages
...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... | |
| Henry Sinclair Hall, Samuel Ratcliffe Knight - Algebra - 1897 - 548 pages
...= 1, у = 4, when x = 2, у = 8, and when x = 3, г/ = 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... | |
| |