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44. How many bricks, each measuring 30 cm x 20 cm 5 cm will be needed to construct a wall 10 m lon 6 m high and 12 cm thick? |
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Answer» The dimensions of Brick = 30 cm, 20 cm, and 5 cm. The dimensions of Wall = 10 m, 6 m, and 12 cm. To find : how many bricks are needed to construct the wall? SOLUTION : ⇒ Let's find the VOLUME of the Brick. The volume of the brick = l × b × h = 30 × 20 × 5 = 30 × 100 = 3000 cm³ ⇒ Let's find the Volume of the Wall. Here, before finding the Volume, we have to convert the length and breadth from cm to m.→ 10 m to cm.1 m = 100 cm 10 m = 10 × 100= 1000 cm→ 6m to cm.1 m = 100 cm 6 m = 6 × 100= 600 cm The volume of the wall = l × b × h = 1000 × 600 × 12 = 600000 × 12 = 7200000 cm³ ⇒ Now, let's find how many bricks are needed. No of bricks = Volume of Wall/Volume of Brick = 7200000/3000= 2400Therefore, 2400 bricks are REQUIRED to construct a wall. |
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