a wall is to be for 420 cm long and 300 cm how many bricks of length 30 cm and breadth 20cm are required to construct the wall
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length of a wall = 420 cm
breadth of the wall = 300 cm
area of rectangular wall = l*b
=420cm * 300cm=126000 sq. cm
length of a brick = 30 cm
breadth of the brick = 20cm
area of rectangular brick = 30 * 20 =600 sq. cm
number of bricks = 126000/600 =210 bricks
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