Question

13 ) Find the total surface area of a cast iron bar whose
length, width and height are 20m, 15m and 12m.
A) 1340 m2
B) 1440 m2
C) 1540 m2
D) 1640 m2​

Answer 1

Explanation:

TSA os a cuboid is 2(lw+wh+hl)

so, putting in the values of l, w and h in their place, we get

2(20m×15m+15m×12m+12m×20m)

2(300m+180m+240m)

2(720)m²

1440m²

so, the answer is b.... 1440m²

hope it helps you!!!