How long will a man take to make a round of a circular field of radius 21 m, cycling at the speed of `8 km//h`? 

How long will John take to make a round of a circular field of radius 21 m cycling at the speed of 8 km/hr?

How long will John take to make a round of a circular field of radius 21m cycling at the speed of 8km/hr ?

How long will a man take to go, walking at 13.2 km/h , round a circular garden of 700 m radius ?

8.How long would a boy take to walk once round a circular park whose diameter is 420m if his speed is 3km/h

Calculate the angular speed of a car which rounds a curve of radius 8 m at a speed of 50 km/h.

A man runs round a circular field of radius 50m at the speed of 12km/hr .What is the time taken by the man to take twenty rounds of the field? (a) 30min.(b) 32min.(c) 34 min.(d) None of these

An aeroplane moving with a uniform speed of 200km//h takes half an hour to cover a circular path of radius 50m. Find the displacement.