Question

plz tell me how to solve this question
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Answer 1

2) Given, volume of the cuboidal shaped soap bar = 150 cc.

Length and breadth of the cuboidal shaped soap bar are respectively 10 cm and 5 cm.

Let the thickness be "t".

By condition,

10×5×t = 150

Or, t = 150/50

Or, t = 3

Therefore the thickness of the cuboidal shaped soap bar is 3 cm (ANSWER).

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3) Volume of a brick = (25×15×10) cc or 3750 cc.

Volume of the wall = (6×2.5×0.5)m³ or 7.5 m³

Let "n" number of bricks are required to build the wall of volume 7.5 m³ or 7,500,000 cc.

Therefore, volume of n bricks = 3750n cc

By condition,

3750n = 7,500,000

Or, n = 2000

Therefore, the required number of bricks to build the wall of volume 7,500,000 cm³ is 2000 (ANSWER).