Question

A cylinder of base diameter 8 cm and height 7 cm is dipped vertically one by third in the bucket full of paint how much area gets painted​

Answer 1

108.853 square centimeter area gets painted

Solution:

Given that,

A cylinder of base diameter 8 cm and height 7 cm is dipped vertically one by third in the bucket full of paint

The surface area of cylinder is given as:

$cylinder\ surface\ area= 2 \pi rh+2 \pi r^2$

It is dipped one by third

Also, the bottom of the cylinder Area = $\pi r^2$

Therefore,

Surface area becomes:

$cylinder\ surface\ area= \frac{2 \pi rh}{3} +\pi r^2$

From given,

h = 7 cm

diameter = 8 cm

Radius = 8/2 = 4 cm

Therefore,

$Cylinder\ surface\ area = \frac{2 \times 3.14 \times 4 \times 7}{3} + 3.14 \times 4^2\\\\Cylinder\ surface\ area = 58.613 + 50.24\\\\Cylinder\ surface\ area = 108.853$

Thus 108.853 square centimeter area gets painted

Learn more about cylinder

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