Question

(Q) Some bricks are arranged in an area measuring 20 cu. m. If the length, breadth and height
of each brick is 25 cm, 12.5 cm and 8 cm respectively, then in that pile the number of bricks
are (suppose there is no gap in between two bricks) (a)6,000
(b) 8,000
(c) 4,000
(d)10,000

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Answer 1

measuring area where we have to arranged bricks =20m³

area of 1 brick = 0.25×0.125×0.08 m³

= 0.0200 ×0.125 = 0.0025 = 25×10^(-4)

number of bricks = measuring volume of pile/ volume of one brick

no. of bricks = 20/(25×10^(-4))

= 20×10^4/25

= 4×10^4/5

= (40/5)×10³

= 8,000

option b is right