A tank is 25 m long, 12 m wide, and 6 m deep. What is the cost of plastering its interior walls and bottom at 75 paise per sq. m?
Q1. A tank is 25 m long, 12 m wide, and 6 m deep. What is the cost of plastering its interior walls and bottom at 75 paise per sq. m?
Answer: 558
Explanation: The interior surface to plaster = bottom (25×12) + two long walls (2×25×6) + two short walls (2×12×6) = 744 m²; cost = 744 × 0.75 = Rs. 558.