Question

QUESTION : how much money has to be paid to labours by the village authorities for digging a well of radius 3.5 cm and height 10 m at the rate of ₹30 per m³?

Answer 1

$\sf{Heya\: mate.\: Solution\: below.}$
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★ $<b>Volume</b>$ ★

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• Given radius of well = 3.5 m

• Given height of well = 10 m




• Then, Volume of the soil in the well,

= volume of a cylinder (as well is in the shape of a cylinder)

$= \pi {r}^{2} h$

$= \frac{22}{7} \times 3.5 \times 3.5 \times 10$

$= \frac{2695}{7}$

$= 385$

= 385 m³



• Now, the cost of digging 1 m³ is 30 Rs.


=>>> Cost of digging 385 m³,

$= 385 \times 30$

$= 11550$

= 11550 Rs.




•°• The village authorities would have to pay 11550 Rs to the labourers to dig a well of radius 3.5 m and height 10 m.
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Thank you... (^_-)

Answer 2

Answer:

radius of a well=3.5cm

height of the well=10m

volume of the well=πr^2h

22/7×3.5×3.5×10

=385m^2

therefore the cost to be paid to the labours @ 30 per metre cube=385×30=11550