Question

the swimming pool is 20m length 15m breadth and 4m in depth. find the cost of painting its four walls at the rate of rs 20per sq m

Answer 1

First find the lsa + lb ....

.lsa 2h<l+b>

2*4<20+15>

8*35

280

now lb....

20*15

300

add them

280+300

580

now cost is 12 per m sq so

....580*12

6960 rupee