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Area of Square

A rectangular...

Question

A rectangular pit 1.4 m long, 90 cm broad and 70 cm deep was dug 1000 bricks of base 21 cm b y 10.5 cm were made from the earth dug out. Find the height of each brick.

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Solution

Volume of rectangular pit =Volume of 1 brick*1000
140×70×90=21×10.5×h×1000
H =140×70×90/21×10.5×1000
=14×7×9/21×10.5
=2×9/3×1.5
=4
The height is 4cm

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