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 1/7 of the remaining paint. How many gallons of paint has Joe used?
Answers.
A) 18
B) 128
C) 175
D) 216
E) 250
Total paint initially = 360 gallons   Paint used in the first week = (1/4)*360= 
<gadget id="calculator">(1/4)*360</gadget>
<output>90</output>
90 gallons.   Remaning paint= 270 gallons   Paint used in the second week = (1/7)*270 = 38 gallons   Total paint used = 128 gallons.   Option 128
<result>B</result>
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 1/7 of the remaining paint. How many gallons of paint has Joe used?