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Question

Half of a cuboidal water tank with length of 2.1 m and breadth of 1.5 m is filled with water. If 630 liters of water is poured into the tank, then calculate the increased height of water.

WBBSE Class X Mathematics Rectangular Parallelopiped or Cuboid 04 Mark 2022

Answer

Length = 2.1 m

Breadth = 1.5 m

Base area = 2.1 × 1.5 = 3.15 m²

Volume poured = 630 L = \frac{630}{1000} m³ = 0.630 m³

Increase in height = \frac{0.630}{3.15} m

= 0.2 m

= 20 cm

The water level rises by 20 cm.

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