A man is running at the speed of 54 km/h. What is the time taken by man to cover one round of circular garden of radius 70 m?
Answer & explanation
Correct answer: option 3
1 round of circular garden = 2πr
= 2 × \(\frac{22}{7}\) × 70
= 440 m
Speed of man = 54 × \(\frac{5}{18}\) = 15 m/sec
Time taken to cover this distance = \(\frac{distance}{speed}\)
= \(\frac{440}{15}\)
= 29.33 seconds