Question

Dimensions of a hall is 10 metre into 9 into 8 metre find the cost of whitewashing the walls and the ceiling @ rupees 8.50 m square

Answer 1

Answer:

AREA OF WHITE WASHING

         2(LB + BH  + HL)  -  LB

        or, [2(10 X 9 + 9 X 8 + 8 X 10)  - 10 X 9] m²

        or, [2(90 + 72 + 80) - 90] m²

        or, [2(242) - 90] m²

        or, [484 - 90] m²

        or,394 m²

  now cost of white washing =  394 m² x 8.50 Rs

                                               or, 3349 Rs ans

   

hope u will understand it