Question

A well is 3.5 m in radius and 22.5m deep has to be dug. Find the cost of digging the well at ₹3.40 per cubic metre?

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Answer 1

Answer:

Volume of well V=

Given h=14 m,r=2 m

V=

Cost of digging 1=Rs 1.20

Cost of digging 176=1761.20=Rs. 211.20'

Answer 2

$\huge{ \cal{ \purple{ \underline{ \underline{ AnSwEr}}}}}$

$\large{ \rm{ \underline{ Given :-}}}$

Radius = 3.5m

Height = 22.5m

$\small{ \boxed{\rm{ volume = \pi {r}^{2}h}}}$

$= > \frac{22}{7} \times {3.5}^{2} \times 22.5$

$= > 866.25 \: {cm}^{2}$

$\large{ \rm{ \underline{ Now :-}}}$

$\small{ The \: cost \: of \: digging \: at \: ₹3.40 {m}^{2} \: is }$

=> ₹ (866.25 × 3.40)

=> ₹ 2945.25