a swimming pool is 40m long 25m wide 6m deep find a cost of cementing of its floor and walls at the rates of ₹135 square per meter

1 answer

surface area = base + 4 sides
= 40(25) + 2(40)(6) + 2(25)(6) m^2
= .....

Once you have the total surface area, multiply that by your cost of 135 per square metre.