Question

a plastic box is 12m long 9m wide and 4m deep is to be made it is to be open at the top find area of sheet required for making the box

Answer 1

Area of sheet = T. S. A. of box - area of open side

= 2(lb + bh + hl) - lb

= 2 (12*9 +9*4 +4*12) - 12*9

= 2 ( 108+36+48) - 108

= 2*192 - 108

= 384 - 108

= 276 square metere