NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.5 – Part 1

Q-1 A matchbox measures. What will be the volume of a packet containing such boxes?

Solution:

• Each matchbox measures

• Therefore, , and

Volume of one matchbox

Volume of a packet containing such boxes

Q-2 A cuboidal water tank is long, wide and deep. How many litres of water can it hold? ()

Solution:

• Dimensions of water tank

Therefore Volume of the tank

Therefore, the tank can hold

• [Note that, 1]

• Liters of water.

Q-3 A cuboidal vessel is long and wide. How high must it be made to hold cubic metres of a liquid?Solution:

We know that,

• Length ,

• Breadth

• Volume

Volume of cuboid

Therefore, Height =

Q-4 Find the cost of digging a cuboidal pit long, broad anddeep at the rate of

Solution:

We know,

Volume of the pit

Rate of digging is ^. Therefore, total cost of digging the pit =