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

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 ?

A cyclist goes once round a circular track of diameter 105 metre in 5 minute . Calculate his speed.

A, B and C start together from the same place to walk round a circular path of length 12 km. A walks at the rate of 4 km/h. B 3 km/h and C (3)/(2) km / h. They will meet together at the starting place at the end of.