The wheel of a carriage is 91 cm in diameter and makes 5 revolutions per second. How fast is the carriage running ?

The wheel of a railway carriage is 40cm in diameter and makes 6 revolutions in a second, how fast is the train going?

The wheel of a railway carriage is 40 cm in diameter and makes 7 revolutions in a second, find the speed of train.

The volume of a cube is increasing at the rate of 7 cubic metre per second. How fast is the surface area increasing when the length of an edge is 24 cm?

The wheels of a car are diameter 70 cm each. How many complete revolutions does each wheel make in oneminute when the car is travelling at the speed of 52.8 km per hour.

The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66 km per hour ?

The two equal sides of an isosceles triangle with fixed base b are decreasing at the rate of 3 cm per second. How fast is the area decreasing when the two equal sides are equal to the base ?

A ball of 0.03 m diameter and 0.3 kg in weight is attached to the end of a thin string of 0.46 m length. If it is rotate uniformly in a horizontal circle at the rate of 15 revolutions per second, what is the tension in the string? Take pi^2 = 9.87 ).

An edge of a variable cube is increasing at the rate of 3 cm second. How fast is the volume of the cube increasing when the edge is 10 cm long?

Two equal sides of an isosceles triangle with fixed base 'a' are decreasing at the rate of 9 cm/second. How fast is the area of the riangle decreasing, when the two sides are equal to 'a' ?