Question

Find the total surface area of a cuboid whose length, breadth, and height are 7.5 m, 3 m, and 5 m, respectively.

• A. $115m^2$
• B. $120m^2$
• C. $150m^2$
• D. $90m^2$

Answer 1

The correct option is C $150m^2$

Given dimensions of the cuboid:
Length (l) = 7.5 m, Breadth (b) = 3 m, and Height (h) = 5 m.
TSA = 2(lb + bh + lh)
$=2\left[\right(7.5\times 3)+(3\times 5)+(7.5\times 5\left)\right]$
$=2(22.5+15+37.5)$
$=2\times 75$
$=150m^2$