Question

two men Pravin and Varun start their morning walk at the same time from the same starting point around a circular playground travel complete 3 full rounds in 12 minutes while one complete only to run in the same amount of time the radius of the playground is 21 average speed of Pravin is???​

Answer 1

Answer:

Radius = 21

perimeter

$2 \times \frac{22}{7} \times 21 \\ 44 \times 3 = 132$

So 1 round = 132 m

3 rounds = 132 × 3 = 396 m

So,

$avg. \: speed = \frac{total \: dist.}{total \: time} \\ = \frac{396}{12} = 33$

So avg. speed of Pravin is 33 km / h

Answer 2

Answer:

Radius = 21

perimeter

So 1 round = 132 m

3 rounds = 132 × 3 = 396 m

So,

So avg. speed of Pravin is 33 km / h

Step-by-step explanation: