Question

the inner diameter of A circular well is 3.5m it is 10m deep find the cost of plastering its inner curved surface at rs 4 per square meter.​

Answer 1

Step-by-step explanation:

Given:

⇒(i)r= radius=3,5/2

=1.75 m,

h= depth of the well=10m

⇒Curved surface area

=2πrh

=(2× 22/7×1.75×10)m

=110m

⇒(ii) Cost of plastering = Rs 4per m

square

The cost of plastering the curved surface = Rs (110×4)= Rs 440