Question

1
(a
A cylindrical pillar 70 cm in diameter and 4 m high is to be cemented all around the curved surface. Find the
cost of cemenung it at the rate of 32 per m
ill an inner radius of 2 m. Find the cost of plastering its inner curved surface at the
1​

Answer 1

The cost of cementing it is Rs.281.6

Step-by-step explanation:

Diameter of cylindrical pillar = 70 cm

Radius of cylindrical pillar=

100 cm = 1m

So, Radius of cylindrical pillar= 0.35 m

Curved surface area of cylindrical pillar =

Cost of cementing 1 sq.m. = Rs.32

Cost of cementing 8.8 sq.m. =

Hence the cost of cementing it is Rs.281.6

#Learn more:

The total surface area of cylinder is 462cm square. it curved surface area is one third of its total surface area . find the volume of cylinder