A water tank in the shape of a prism has isosceles trapeziums as bases whose dimensions are shown below.

The length of the tank is 80 centimetres. How many litres of water can it contain?

The picture below is of a water trough:-

The front and back faces are identical isosceles trapeziums. How many litres of water can it hold?

A water tank has two faces congruent isosceles trapeziums and the other faces rectangles. Its dimensions are as shown below:

What would be the cost of painting its inside and out at the rate of 75 rupees per square metre?

The dimensions of a rectangular water tank are 2 m 75 cm by 1 m 80 cm by 1 in 40 cm. How many litres of water does it hold when filled to the brim?