Water is running into a conical vessel, 15 cm deep and 5 cm in radius, at the rate of 0.1 `cm^2`/sec . When the water is 6 cm deep, find at what rate is the water level rising?

Water is leaking form a conical funnel at the rate of 5cm^3//s , If the radius of the base of funnel is 5 cm and height 10 cm, find the rate at which the water level is dropping when it is 2.5 cm from the top. Is leaking of water leads to wastage of water? Should we do everything to ssave this natural resource?

If side of a square is increasing at the rate of 1.5 cm/sec, then the rate of change of its perimeter is :

If side of a square is increasing at the rate of 1.5 cm/sec, then the rate of change of its perimeter is :

Water runs into an inverted conical tent at the rate of 20 ft^3 / min and leaks out at the rate of 5 ft^3 /min .The height of the water is three times the radius of the water's surface. The radius of the water surface is increasing when the radius is 5 ft, is