Question

Question 1
यदि बेलन की त्रिज्या 4 सेमी है और ऊंचाई 10 सेमी है,
तो बेलन का कुल पृष्ठीय क्षेत्रफल है। If the
radius of the cyclinder is 4 cm and height is 10
cm, then the total surface area of cyclinder is
440cm​

Answer 1

Given:

If the radius of the cylinder is 4 cm and height is 10 cm

To find:

The total surface area of the cylinder

Solution:

The formula of the total surface area of a cylinder is as follows:

$\boxed{\bold{T.S.A.\:of\:a\:cylinder = 2\pi r(h + r)}}$

The radius of the cylinder, r = 4 cm

The height of the cylinder, h = 10 cm

Now, by substituting the values of h and r in the formula above, we get

The total surface area of a cylinder is,

= $2\times \frac{22}{7}\times 4 \times (4 + 10)$

= $2\times \frac{22}{7}\times 4 \times 14$

= $2\times 22 \times 4 \times 2$

= $\bold{352\:cm^2}$

Thus, the total surface area of the cylinder is → 352 cm².

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