Question

A cuboid has a total surface area of 200cm^

it has a hight of 6
width of 10
length of (a)

what is the length of a

Answer 1

• 2.5 units

Explanation:

The total surface area is

• S = 2*(ab + bc ac)

Given

• Sides are 6, 10 and a

Find the missing value

• 200 = 2(6*10 + 6a + 10a)
• 100 = 60 + 16a
• 16a = 40
• a = 40/16
• a = 2.5