CAMANISHPARMAR wrote:
Attachment:
#GREpracticequestion In the rectangular solid shown, PQ = 5.jpg
In the rectangular solid shown, PQ = 5, QR = 12, and the volume is 480. What is the total surface area of the solid, in square units?
Add information to diagram, and let x = length of missing side
The volume of a rectangular box = (length)(width)(height)We're told the volume = 480
So, we can write: (5)(12)(x) = 480
Simplify to get: 60x = 480
Solve,
x = 8Add this info to the diagram....
What is the total surface area of the solid, in square units?Area of FRONT face = (8)(12) =
96So, area of BACK face =
96Area of TOP face = (5)(12) =
60So, area of BOTTOM face =
60Area of LEFT face = (5)(8) =
40So, area of RIGHT face =
40TOTAL surface area =
96 + 96 + 60 + 60 + 40 + 40= 392
Answer: 392
Cheers,
Brent