The time taken by Rahim to travel along the diameter of a circular field is 40 sec less as he takes the time to round the field. If the speed of Rahim be 90 m per minute, then find the diameter of the field.

A horse travelled a circular field in 1(1)/(2) minutes at a speed of 66 m per minute. What is the radius of the field ?

The radius of the wheel of a train is 0.35 m. If the wheel rounds 450 times in one minute, then find the velocity of the train per hour.

The distance between two places is 200 km. The time taken by moter car to travel from one place to another is more by 2 hrs than the time taken by a zeep car.If the speed of the motor car is 5 kms/hr less than the speed of the zeep car, then find the speed of the motor car.

If the area of square between a circular and a square field of equal perimeter, be 484 sq-m, then the diameter of the circular field is

A well is drugged on a square field of side 4.2 m. Find the expenditure of fencing round the well at a rate of Rs. 10 per meter.

A boat takes 6 h to travel some distance along the current on a river. It takes 10 h to travel the same distance against the current. Find out the time taken by the boat to travel that distance in the absence of any current.