Shara's new lawn sprinkler watered a circular area with three times the radius of the old sprinkler. How many times greater was the area watered by the new sprinkler than the area watered by the old sprinkler?

a)3

b)6

c)9

d)36

Question

05-09-2016
Mathematics

Answered

Shara's new lawn sprinkler watered a circular area with three times the radius of the old sprinkler. How many times greater was the area watered by the new sprinkler than the area watered by the old sprinkler?

a)3

b)6

c)9

d)36

Verified Answer :

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CrystalKelly CrystalKelly · Answer 1 · 2016-09-05T18:55:17-04:00

The answer is C. when you have questions like these, its best to plug in an easy number and test it out.

Say the original radius was 2. That means the area of that sprinkler was 12.56 (if you use the formula Pi(radius)squared.

a number 3 times bigger then 2, is 6. (2 times 3 = 6) There fore, following the same formula as before, you plug that number in and get 113.04 as the area of the new sprinkler.

113.04 divided by 12.56 is 9

Shara's new lawn sprinkler watered a circular area with three times the radius of the old sprinkler. How many times greater was the area watered by the new sprinkler than the area watered by the old sprinkler? a)3 b)6 c)9 d)36

Verified Answer :

Related Questions

Shara's new lawn sprinkler watered a circular area with three times the radius of the old sprinkler. How many times greater was the area watered by the new sprinkler than the area watered by the old sprinkler?

a)3

b)6

c)9

d)36