Question

4.The whole surface area of a cuboid 28 cm long, 16 cm broad and 7.5 cm height, is: a.) 1656 cm2 b.) 1546 cm2c.) 1566 cm2 d.) 1556 cm2

Answer 1

2*(7.5*28 + 16*7.5 + 16*28)
the general formula is : 2(l*b +b*h +h*l)
hope this helps
option D