NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.5 – Part 1
Q1 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
Q2 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.
Q3 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 =
Q4 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 =