Given a cylindrical tank, in which situation will you find surface area and in which situation volume: Number of cement bags required to plaster it.

Given a cylindrical tank, in which situation will you find surface area and in which situation volume: To find the number of smaller tanks that can be filled with water from it.

Find the total surface area of a cuboid which is 6 cm long, 7 cm wide and 8 cm high.

Find the time required for a cylindrical tank of radius r and height H to empty through a round hole of area a at the bottom. The flow through the hole is according to the law v(t)=ksqrt(2gh(t)) , where v(t) and h(t) , are respectively, the velocity of flow through the hole and the height of the water level above the hole at time t , and g is the acceleration due to gravity.

Can you find an even number greater tha 4 which cannot be expressed as a sum of two odd numbers ?

A right circular cone with radius R and height H contains a liquid which evaporates at a rate proportional to its surface area in contact with air (proportionality constant =k gt 0 ). Find the time after which the cone will be empty.