How many hallow blocks of size 30cm×15cm×20cm are needed to construct a wall 60m in length ,0.3m in breadth and 2m in height
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first we will convert m into cm then 30×15×20/ 60×0.3×2 the answer will come
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No of hollow blocks = volume of wall÷ volume of hollow blocks
No of hollow blocks = 6000×30×200÷30×15×20
=4000 hollow blocks
No of hollow blocks = 6000×30×200÷30×15×20
=4000 hollow blocks
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