Question

A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:

Answer 1

In a cuboidal tank,

l=25 m

b=12m

h=6m

ar. to be plastered = 2(lh +bh) + lb

                              = 2 X 25X6 + 12 X6 + 25 X12

                               = 47100 m²

  now cost of plastering @ 75 p per m²= 47100 X 75p

                                                                 =  Rs.35325.00