Question

Essential ICSE Mathematics for Class 8
(i) A rectangular tank, 8 m long, 7 m wide and 5 m high, contains water to a
2 m deep, contains water to a depth
that is 4 m long and 3
3 m. How much more water can it hold?​

Answer 1

Volume of the rectangular tank ⇒ V = lbh

⇒ V = 8 × 7 × 5

⇒ V = 280m³

Now, find the volume of the water using the same formula, i.e. V = lbh.

⇒ V = 4 × 2 × 3

⇒ V = 24m³

Now, to find how much more water it can hold, we will subtract the obtained volume from each other.

⇒ V = 280 - 24

⇒ V = 256m³

Thus, we can conclude that the tank can hold 256m³ more water.

Answer 2

Answer:

Volume of rectangular tank=V=l×b×h

V=8×7×5

V=280m³

Now find the volume of the water using the same formula

I.e.V=L×B×H

V=4×3×3

V=36m³

Now to find how much more water it can hold,we will subtract the obtained volume from each other

V=280-36

V=244m³

★Hence,the rectangular tank can hold 224m³ quantity of water more.

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