Question

Find the cost of painting a tank of dimension $3m\times 2m\times 1.5m$ at ₹20 per square metre .

Answer 1

Given: Length = 3m
Breadth = 2m
Height = 1.5m
Cost of painting=Rs.20/$m^2$

To find:-
Cost of painting the tank
TSA (Total surface area) = 2 (lb + bh + lh)

TSA (Total surface area) = 2 × [(3)(2) + (2)(1.5) + (3)+(1.5)

TSA (Total surface area) = 2 × (6 + 3 + 4.5)

TSA (Total surface area) = 2 × 13.5

TSA (Total surface area) =$27m^2$

Cost of painting = TSA × 20
Cost of painting = 27 × 20
Cost of painting = Rs.540