Question

EXERCISE 13.5
1.
A matchbox measures 4 cm x 2.5 cm x 1.5 cm. What will be the volume of a packet
containing 12 such boxes?
2. A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many litres of water
can it hold? (1 mº = 1000 1)​

Answer 1

Answer:

1.Volume = lxbxh

4×2.5×1.5

=15cm³

Volume of packet= volume of 12 boxes

=15cm³ x 12= 180cm³

2. Volume of the tank = 6×5×4.5

=135m³

1m³=1l

135m³=135 litre

Answer 2

Answer:

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EXERCISE 13.5

1.A matchbox measures 4 cm x 2.5 cm x 1.5 cm. What will be the volume of a packet

containing 12 such boxes?

• Given,

• Dimensions of the matchbox

• l = 4cm, b = 2.5cm, h = 1.5cm

• As we know, a matchbox is a cuboid and, Volume of a cuboid = l×b×h

• So, volume of the matchbox = 4cm×2.5cm×1.5cm = 15cm³

• Now, Volume of 12 such matchboxes will be 12×15cm³ = 180cm³

• Therefore, the volume of a packet containing 12 such matchboxes will be 180cm³.

2. A cuboidal water tank is 6 m long, 5 m wide and 4.5 m deep. How many litres of water

can it hold? (1 mº = 1000 1)

• Given,L= 6m b=5m, h=4.5m
• ⇒Volume of tank =l×b×h
• ⇒V=6×5×4.5=135m^3
• ⇒Amount of water hold by 1m^3
• volume =1000l
• Amount of water hold by 135m^3
• volume
• =135×1000
• =135000l

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