Question

A piller of cylindrical shape having height 35m and diameter 2.8m . find the cost of painting it's surface at 20Rs.per metre square​

Answer 1

question ..

A piller of cylindrical shape having height 35m and diameter 2.8m . find the cost of painting it's surface at 20Rs.per metre square

answer--

Solution

Given:

⇒(i)r= radius=

2

3.5

​

=1.75 , h= depth of the well=10m

⇒Curved surface area

=2πrh

=(2×

7

22

​

×1.75×10)m

2

=110m

2

⇒(ii) Cost of plastering = Rs 40 per m

2

The cost of plastering the curved surface = Rs (110×40)= Rs 4400.

Step-by-step explanation: