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11.
Find the number of bricks measuring 25 cm in length, 5 cm is breadth and 10 cm in height for a wall 40 metres long, 75 cm broad and 5 metres in height.
  • A.
    1440
  • C.
    144
  • B.
    144000
  • D.
    120000
  • Answer & Explanation
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Answer : [D]
Explanation :
Volume of he wall = 40 x
75
100
 x 5 = 150 m3      
Volume of 1 brick =
25
100
x
5
100
x
10
100
=
1
800
 m3  
Number of bricks required =
150
1/800
=  150 x 800 = 120000  
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