Maths-
General
Easy
Question
The dimensions of a right rectangular prism are 4 inches by 5 inches by 6 inches. What is the surface area, in square inches, of the prism?
- 30
- 74
- 120
- 148
The correct answer is: 148
HINT :- surface area of rectangular prism is given br A = 2 (lb + bh + hl) whereas l is length, b is breadth and h is height of the rectangular prism.
Given , the rectangular prism is 4 by 5 by 6 inches
I.e l = 4 inch , b = 5 inch and h = 6 inches respectively.
Then surface area A = 2(4 × 5 + 5 × 6 + 6 × 4)
A = 2( 20 + 30 + 24 )
A = 2 (74) = 148 sq.inches.
The required surface area is 148 sq.inches
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