Question

A swimming pool of length =25m ,breadth =15m and height = 2m is three fourths full of water. Find the volume of water in the pool

Answer 1

the volume OF the pool= l×b×h
=750 m^3

but volume of the water present is 3/4 volume of pool = 3/4× 750

= 562.5 m ^3

Answer 2

Answer:

How many bricks of length  25cm,  breadth  15cm  and height  10cm  are required to build a wall of length  6m,  height  2.5m  and breadth  0.5m?

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Solution

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Length of brick=25cm

breadth of brick =15cm

height of brick=10cm

volume of brick =length×breadth×height

=25cm×15cm×10cm

=3750cm3

length of wall=6m=600cm 

breadth of wall=0.5m=50cm

height of wall =2.5m=250cm

volume of wall=length×breadth×height

=600×250×50=7500000cm3 

the number of bricks required=37507500000 

=375750000  

=2000

hence, number of bricks =2000