Question

A swimming pool is 20m in length, 15m in breadth and 4m in depth . Find the cost of painting its four walls at the rate of 20Rs per square metre

Answer 1

Answer:

280m^2 and RS 5600

Step-by-step explanation:

First we have to put formula of four walls.

2h(l+b) where h is height l is length and b is breadth.

2*4(20+15) depth is its height.

8*35

280m^2

Now for painting its four walls at 20 RS per square meter.

280*20

RS 5600 will be the cost for painting its four walls.

Answer 2

According to question..

we understand that question...

we put the formula of lateral surface of coboid

2h(l+b)..

2*4(20+15)

=8*35

=280

the cost of four walls at rate of 20rs per sq. m

=280*20

=5600

so, I hope you will understand that question properly...