Question

if the total surface area of a cuboid is 1097 cm and the length is 19 cm and the width is 16 cm , find the area of the 4 sides of the block?

Answer 1

1097=2(19×16+16×h+h×19)
548.5 = 304+16h+19h
548.5-304=35h
244.5=35h
244.5/35=h
6.98 = h
h = 7    (approx.)

area of the 4 sides of the block=2(l+b)×h
                                             =2(19+16)×7
                                             =2×35×7
                                             =490