Question

if the inner curved surface of the well in part (1) above is to be plastered at the rate of rupees 50 per meter square , find the cost of plastering

Answer 1

Answer:

Rs 23571.42  

Step-by-step explanation:

Data seems in sufficient:  

If I consider  it has a well dimensions  as,

Depth of the sink  = 25 m

Diameter of the sink  = 6m

Radius of the sink  = 3 m

Volume of the earth taken from the sink = $\pi r^2h$

                                                            $= 22/7 \times 3 \times 3 \times 25$

                                                            $=707.1428 m^3$

Inner curved surface area of the sink = $2\pi rh$

                                                       $= 2 \times 22/7 \times 3 \times 25$

                                                       $= 471.42 m^2$

                               Cost of plastering = $Rs.50 /m^2$

                      Total cost of plastering = $471.42 \times 50 = Rs.23571.42$