Question

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Answer 1

$\huge\red{\underline{✪Answer}}$

$5cm$

$\huge\green{\underline{✪Explanation}}$

Let the height of embankment be h.

Volume of earth taken out = $πr2h</p><p>= 227×(7)2×15$

Volume of earth taken out = Volume of embankment

[an embankment is a heap of stone or mud or earth to stop water]

$πr2h=π(r1+r2)2h−πr21h$

$[Because r1=7,r2=7]$

$=> 227×72×15=227(142−72)$

$Therefore, h=72×15196−49=5m$

Answer 2

$\huge\sf\red{Solution}$

$\huge\purple\dag{5cm}\purple\dag$

$\huge\sf\green{Explanation}$

• Let the height of embankment be h.

Volume of earth taken out = πr²h

= 227 × (7)² ×15

★ Volume of earth taken out = Volume of embankment

[an embankment is a heap of stone or mud or earth to stop water]

➮ $\bf{πr2h = π(r1+r2)²h − πr²1hπr²h}$

➮ $\bf{π(r1+r2)²h − πr²1h}$

[Because r1=7,r2=7]

➮ $\bf{227×72×15=227(142−72)}$

Therefore,

➮ $\mathcal{h = 72 × 15196 − 49}$

➮ $\mathcal{5m}$

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