Question

if a water tank is 10 m long 4 m wide and 1.5 deep determine the cost of plastering the 4 walls and the floor at the rate of 20 rs per sq m

Answer 1

Answer:

Area of 4 walls = 2h *(l + b)

= 2*1.5*(10+4)

= 3 * 14

= 42m²

Cost of plastering at 20 rs per m² = 42m² * 20 = Rs 840