What is the polar diameter of the Earth?
48 km
44 km
38 km
54 km
The wheel of a cart is making 4 revolutions per second. If the diameter of the wheel be 84 cm, find its speed.
The wheel of a cart is making 5 revolutions per second. If the diameter of the wheel is 84 cm, find its speed in km/hr. Give answer correct up to the nearest km.
The speeds of two cars are in the ratio 9:17. If the second car covers 510 kms in 5 hours, then the speed of the first car is
Sam plans to go by bus and walk back. If the speed of bus is 45 kms per hour and he can walk at the rate of 5 kms per hour, how far can he ride by bus if his total journey is of 12 hours?