Manhattan Prep
Joe needs to paint all the airplane hangars at the airport, so he buys 360 gallons of paint to do the job. During the first week, he uses 1/4 of all the paint. During the second week, he uses 1/5 of the remaining paint. How many gallons of paint has Joe used?
A. 18
B. 144
C. 175
D. 216
E. 250
OA B
Joe needs to paint all the airplane hangars at the airport, so he buys 360 gallons of paint to do the job. During the...
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Solution:AAPL wrote: ↑Fri Feb 05, 2021 10:37 amManhattan Prep
Joe needs to paint all the airplane hangars at the airport, so he buys 360 gallons of paint to do the job. During the first week, he uses 1/4 of all the paint. During the second week, he uses 1/5 of the remaining paint. How many gallons of paint has Joe used?
A. 18
B. 144
C. 175
D. 216
E. 250
OA B
In the first week, Joe uses 1/4 x 360 = 90 gallons of paint, so 270 gallons are left.
Then, in the second week, he uses 1/5 x 270 = 54 gallons of paint.
So, in total he has used 90 + 54 = 144 gallons.
Answer: B
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