Question

Find the total surface area of a cuboid whose dimensions are 8 cm, 12 cm, and 15 cm

Answer 1

TSA of cuboid
=2(lb+bh+lh)
=2(8×12+12×15+8×15)
=2(96+170+120)
=2(386)
=772sq.cm

Answer 2

Given that,
length(l) = 8cm
breadth(b) = 12cm
height(h) = 15cm

Now
total surface area of a cuboid is 2 (lb+ bh+hl)
=》2{(8×12)+(12×15)+(15×8)}
=》2 (96+180+135)
=》2 ( 411)
=》822

therefore T.S.A of cuboid is 822 sq.cm