Question

The diameter of a well is 2.1m and it is 1.4 m deep . Find the cost of plastering it at Rs.5 per square m .

Answer 1

Answer:

“Even the worst days have an ending, and the best days have a beginning.” ...

Answer 2

Step-by-step explanation:

Given

Diameter (d)=2.1m

Deapth i.e height=1.4m

cost per square m=5Rs

radius=1.05

To find the total surface area of well,

Surface area of cone =pie*r*h

=22/7*1.05*1.4

=4.62

...Therefore the surface area of well is 4.62 sqm.

Now ,

To find the cost for plastering the well,

Total cost=surface area of well*cost per sqm

=4.62*5

=23.1 m

.Therefore the cost required to plaster the well is 23.1 Rs.