Question

find the total surface area of cuboids of length breath and height as below 1) 5 cm 3.5 cm, 1.4 cm. 2) 2.5 cm,2 m,2.4 cm. 3)8 cm, 5 cm, 3.5 cm. 5) 4 cm,2.5 cm, 1.5 cm 6) 1.5 cm, 12 cm, 1.3 cm

Answer 1

1) L = 5 B = 3.5 H = 1.4

TSA of cuboid = 2(lb + bh + hl)

= 2(5*3.5 + 3.5*1.4 + 1.4*5)

= 2(17.5 + 4.9 + 7.0)

= 2*29.4

= 58.8


Similarly you can easily find TSA for others.


Thanks