Question

answer the question.....​

Answer 1

I hope this would help you

Answer 2

$\mathfrak{\huge{\underline{Solution:}}}$

$\textbf{\huge{\underline{Given:}}}$

● Height = 20m

● Diameter = 7m

● Length of rectangle(l) = 22m

● Breadth of rectangle(b) = 14m

Find radius from the given diameter

$\star \rm \: Radius = \dfrac{Diameter}{2}$

$\hookrightarrow \sf \: \dfrac{7}{2} = \large \boxed{3.5 \sf \: m}$

$\textbf{\underline{\underline{Volume\:of\:earth\:dug:}}}$

$\star \rm \: Volume \: = \pi {r}^{2}h$

$\hookrightarrow \: \sf \: \dfrac{22}{7} \times 3.5 \times 3.5 \times 20$

$\hookrightarrow \: \sf \large \boxed{770 \sf \: {m}^{3} }$

$\textbf{\underline{\underline{Area\:of\:Platform:}}}$

$\star \rm\: Area \: = l \times b$

$\hookrightarrow \: \sf 22 \times 14$

$\hookrightarrow \sf \: \large \boxed{ 308 \sf \: {m}^{2} }$

$\textbf{\underline{\underline{Height\:of\:Platform:}}}$

$\star \rm \: Height = \frac{ Volume \: of \: earth \: dug }{Area \: of \: platfom}$

$\hookrightarrow \sf \cancel \dfrac{770}{308}$

$\hookrightarrow \sf \large \boxed{2.5 \sf \: m}$