Question

Answer both questions...
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Answer 1

Question 7. To find Inner Curved Surface Area

Formula= 2  π r h

So

2×22/7×3.5×10 = 220m²

Question 7 Second Part

Cost would be 220×40= Rs8800

Question 8

We have to find Total Radiating Surface

So Remember this that Radiating surface is that area that comes in contact with water.

So In a pipe the area that will come in Contact with Water is its Inner curved Surface Area only....

So Inner curved Surface Area=

2πrh

2 × 22/7 × 2.5/100 × 28

4.4 m² area

Answer 2

Step-by-step explanation:

this chapter is going on my tution...so it will help you..