Question

find the cost of painting a tank of dimension 3m×2m×1.5m at ₹20 per sq m

Answer 1

Cost = area x per rupees
= 3 x 2 x 1.5
= 9.0
Cost = 9.0 sq m x20
= 180rupees
I hope it will help u

Answer 2

Answer:

Rs 540

Step-by-step explanation:

Surface area=2(lh+bh+lb)

                     =2(3x1.5+2x1.5+2x3)

                     =2(6+3+4.5)

                     =2x13.5

                     =27 sq m

now the cost=20x27

                      =540rs