Question

A closed metallic cylinder has its base diameter 56 cm and it is 2.25 m high. Find the cost of the metal used to make it if it costs Rs. 80 per square meter.

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Answer 1

Step-by-step explanation:

Given:

Diameter: 56cm

Height: 2.25m

Since, 1m=100cm

Therefore,

Height = 2.25m×100

Height=225cm

Now,

Total surface area of cylinder=

$2\pi \: r(r + h)$

Therefore,

$2 \times \frac{22}{7} \times 28cm(28cm + 225cm)$

TSA=22×8(253)

Therefore,

=44528cm^2

$1m {}^{2} = 10000cm {}^{2}$

Therefore,

44528cm^2÷10000

=4.4528m^2

Cost=4.4528m^2×80

=$356.224