Question

8) A cylindrical tube has an outer diameter of
2.5 cm and an inner diameter of 1.5 cm. Its
length is 7 cm. If it has to be anti-rust
coated on the outer side, the inner side and
the rims on both sides, what is the total
surface area to be covered for this purpose?
Calculate the cost if the rate is 0.50 per cm​

Answer 1

Answer:

two surface area like outer and inner surface are

Explanation:

we know that surface area of hollow cylindrical tube is 2π(R+r)h

by this formula

area will be 88cm^2

and total rupees =88*0.50=44 rupees