Question

The surface area of an open-top box with length L, width W, and height H can be found using the

formula:
A = 2LH+2WH + LW
Find the surface area of an open-top box with length 5 cm, width 10 cm, and height 3 cm.
A
cm²

Answer 1

The surface area of the open-top box is 140 cm².

Step-by-step explanation:

To find the surface area of an open-top box, use the formula A = 2LH + 2WH + LW. Plug in the given length, width, and height into the formula and calculate.

Given:

• Length (L) = 5 cm
• Width (W) = 10 cm
• Height (H) = 3 cm

Substitute the values into the formula:

A = 2(5)(3) + 2(10)(3) + (5)(10)

Simplify the equation:

A = 30 + 60 + 50

A = 140 cm²

Therefore, the surface area of the open-top box is 140 cm².