Question

An athlete runs at a speed of 35 m/ h around a sercular ground area is 2464 m square how much time does he take to complet 1 round of ground

Answer 1

Area of circle = πr²

So, πr² = 2464 m;

So, 22/7 * r² = 2464;

So, r² = 2464 * 7/22 = 112 * 7 = 784

So, r = √784 = 28 m

As circumference of circle = 2πr

So, circumference of ground = 2πr = 2 * 22/7 * 28 = 176 m

The athlete covers 35 m / h

As, Speed = Distance/Time

So, 35 m/h = 176/ T

35 = 176/T

So, T = 176/35 = 5 and 1/35 hour = 5h and 1/35 * 60 minutes

= 5 hour and 12/7 minutes

Answer : 5 and 1/35 hour OR 5 hours 12/7 minutes

Hope it helps!

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