How many bricks of length 12.5cm , breadth 7.5 cm and height 5cm are required to build a wall of length 12.5m,height 15m and breadth 50cm
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Answer:
45
Step-by-step explanation:
volume of the wall = length × breadth × height
volume = 12.5 × (50÷100) × 15
(50 ÷ 100 since breadth is in cm we have to convert it into meters)
volume = 93.75 m³.
area of the bricks
= 2×[(length×breadth) + (breadth×height) + (height×length)]
converting length, breadth, height into meters.
therefore length in meters = 12.5 ÷ 100 = 1.25 m
breadth in meters = 7.5 ÷ 100 = 0.75m
height in meters = 5 ÷ 100 = 0.05m
therefore area = 2 × [(1.25 × 0.75) + (0.75 × 0.05) + (0.05 × 1.25)]
area = 2.075m²
required no. of bricks = volume 0f wall ÷ area of brick
= 93.75 ÷ 2.075
= 45.18
approximately 45
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