Bricks are worth Rs. 750 per 1000 and their length, breadth

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Bricks are worth Rs. 750 per 1000 and their length, breadth and height 25 cm, 12.5 cm and 7.5 cm respectively. The cost of bricks required to build a wall 200 m long, 1.8 m high and 37.5 cm thick is ?

1. Rs. 42, 600
2. Rs. 43, 200
3. Rs. 40, 750
4. Rs. 41, 860

Correct Option: B

Number of bricks required = Volume of wall in cm³ / Volume of 1 brick
= (200 x 100 x 1.8 x 100 x 37.5)/(25 x 12.5 x 7.5)
= 57, 600

∴ Required cost = Rs. (750 x 57600)/1000
= Rs. 43, 200