Question

The surface area of a cuboid is 758cm². It's length and breadth are 14cm and 11cm respectively.find its height

Answer 1

Surface area of the cuboid = 2(lb + bh+ lh) = 758 2[ 14* 11+ 11*h+ 14*h] = 758 154 +11h + 14h = 379 or 25h = 225 or h = 225/25 h= 9 cm

Answer 2

let height be h cm
surface area = 2( lb+ bh + lh)
surface area =2 (154+11h+ 14h)
758/2-154=25h
25h= 225
h= 9