Question

a solid Steel cylinder has a radius 2.5 CM and a height of 10 cm tight fitting sleeve is to be made that will extend the radius to 2.6 find the amount of Steel needed for sleeve by the approximation method​

Answer 1

Explanation:

Curved surface area of cylinder =2πrh

Given, r=14 cm, π=

7

22

and h=10 cm

Curved surface area of cylinder =2×

7

22

×14×10

=44×2×10

=880 cm

2

.