10. How many bricks each 25 cm long, 10 cm wide and 7.5 cm thick, will be required for a wall
15 m long, 2.5 m high and 1.25 m thick.
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Answer:
25000
Step-by-step explanation:
volume of 1 brick=25*10*7.5=25*75 cu.cm
volume of wall=1500*250*125=46875000cu.cm
no. of bricks=vol of wall/vol of 1 brick=46875000/1875=25000 bricks
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