Question

a water tank is 10m long ,4m wide and 1.5m deep , determine the cost of plastering the four walls and the floor at the rate of Rs20 per square metre

Answer 1

CSA +FLOOR = 2(LB +BH+BL) - LB = 2(40+6+15)-40 = 82m^2
COST OF PAINTING = 82 × 20 = RUPEES1640