Ncert book exercise 13.3 qno. 3 and 9

1.	Ncert book exercise 13.3 qno. 3 and 9
Answer» Ans3. Height of well ( cylinder) = 20 mDiameter 7 m So radius 7÷ 2mLength of platform 22 mBreadth 14 mVol. Of platform = vol. of cylinder L× b× h= π r2 h22×14× h = 22÷7×7÷2×7÷2×20Solve it

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