Math 7 - HW Question Check (Q3)

posted by .

Kevin designs sprinkler system for his yard. One rotation of the sprinkler waters a circle with an area of 225(pi) square feet. What is the radius, r, of the circle the rotating sprinkler waters?
a) 15 ft
b) 25 ft
c) 30 ft
d) 47 ft
Answer - A
Why?:
A = (pi) x r(2 to the second power)
A = 225 x 15 (2 to the second power)
15 x 15 = 225

  • Math 7 - HW Question Check (Q3) -

    pi r^2 = 225 pi
    r^2 = 225
    r = 15

  • Math 7 - HW Question Check (Q3) -

    im correct :)

    thanks

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    LaQuisha has a sprinkler that waters a circular area. The diameter of the area that the sprinkler waters is 20 feet. The actual sprinkler is located at the origin of the coordinate plane. Write an equation that describes the circumference …
  2. 6th Math

    Don decided to do some landscaping in his backyard. He began by watering the lawn. The rotating sprinkler that he installed can spray an area with a radius of 7 feet. What is the maximum area the sprinkler can cover?
  3. math

    The lawn sprinkler can be adjusted so that the water stream is from 25 to 40 feet. What is the diameter of the largest circle area that this sprinkler will cover.....please help
  4. math

    there is a sprinkler that rotates in a circle,if the sprinkler reaches 7 yards,what is the area that the sprinkler will cover?
  5. Geometry

    A gardener wants the three rosebushes in her garden to be watered by a rotating water sprinkler. The gardener draws a diagram of the garden using a grid in which each unit represents 1 ft. The rosebushes are at (1, 3), (5, 11), and …
  6. Math

    Mr. Anderson has a whirling sprinkler for watering his lawn. The sprinkler waters a circle whose length from the sprinkler to the edge of what is 12 meters. Find the area of the lawn that he can sprinkle at one time. I know it says …
  7. math

    a sprinkler is placed in the corner of a rectangular yard,if the sprinkler has a of reach 26 feet and the yard is 30 feet long and 40 feet wide how many square feet of the lawn will not be watered by the sprinkler?
  8. Geometry

    If a rotating water sprinkler is a set tto spray water out at a radius of 40 feet around a circular revolution of 120 degrees what is the area of the lawn that the water from the sprinkler would then cover
  9. Geometry

    If a rotating water sprinkler is set so spray water out at a radius of 40 feet around a circular revolution of 120 degrees, what is the area of the lawn that the water from the sprinkler would then cover?
  10. Math Please Help

    5. 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?

More Similar Questions