Question

the cost of leveling the ground of a circular region at a rate of rs 2 per square is rs 4928 find the radius of the ground​

Answer 1

Answer:

The radius is 28

Step-by-step explanation:

Area of square = 4928/2

= 2464

22/7 * r*r = 2468

r*r = 2464*7/22

r*r = 784

r = 28

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Answer 2

SolutioN :-

We know that

→ Total Cost of levelling = Rate × Area of region

→ 4928 = 2 × Area of region

→ 4928 / 2 = Area of region

→ Area of region= 2464sq .m

Thus ,

Area of circular region is 2464sq .m

We know that ,

★ Area of circle = πr²

⇒ 2464 = 22 / 7 × r^2

⇒ 2464 × 7 = 22 × r^2

⇒ 17248 = 22r^2

⇒ 17248 / 22 = r^2

⇒ 784 = r^2

⇒ r = √784

⇒ r = 28m

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Thus , The radius of the ground is 28m.