how many bricks of size 30cm by 45 cm by 9cm are needed to make a wall which is 15m long , 18 m high and 60 cm thick
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Step-by-step explanation:
size of brick one = 3cm
brick two = 45cm
brick three = 9cm
therefore, to see how many bricks of size is needed = 30 + 45 x 9
30 + 45 = 75
now 75 x 9 = 765
hence, brick two is 15m long
brick three is 18m high and brick one is 60cm thick
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