Math, asked by apaarkundra17, 1 year ago

The outermost circumference of a circular track is 194.68 m and the track is everywhere 6m wide.Find the cost of levelling the track at the rate of 25 paisa per m.

Answers

Answered by mahi8822
17
Answer is

Let the radius of outer circle be R

Given: Circumference of outer circle = 194.68 m

⇒ 2πR = 194.68 m
⇒ 2 × 3.14 R = 194.68 m
=>R=31m
⇒ Radius of inner circle (r) = Radius of outer circle – width
= 31 m – 6 m = 25 m
Thus area of track = area of outer circle – Area of inner circle
= πR²– πr² = π (R²- r²)=1056m²
Now cost of leveling 1 m2 = 25 paise = Rs 0.25

Hence cost of leveling track = Rs 0.25 × 1056 = Rs 264


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