Question

a bottomless cylinder with radius of base 3.5 cm is kept over a lamp the height of the cylinder is 40 cm,14 circular holes of radius 1 cm are cut out from the lateral surface for the right to shine through find the total surface area of the cylinder

Answer 1

Step-by-step explanation:

Correct option is A)

The total curved surface area for a cylinder is 2(π)r(r+h)

So, the Statement 2 is a standard result and is true.

Now the assertion has the values, so lets try to put them in place and see if result comes out to be correct.

Total Surface Area =2(π)r(r+h)=2×

7

22

×14×44=3872 cm

2

So, we can conclude that both statements are true and reason is the correct explanation to the assertion.

Hence, option A is correct.