Question

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.

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Answer 1

Answer:

₹527.43

Step-by-step explanation:

Outer Circumference of track:- 194.68 m

So,

Outer Radius:-

R = 194.68/2π = 97.34/π = 30.97 m

Now,

Width of track:- 6 m

So,

Inner radius:-

r = 24.97 m

Now,

Area of track:-

A = 2π(R²-r²) = 2π(335.64) = 2109.73 m²

Now,

Cost of levelling:- 25p/m² = ₹0.25 / m²

So,

Total cost:-

Cost per m² * Total area of track

0.25 * 2109.73 = ₹527.43

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