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square inches problem

Expert replies
by alltimeacheiver » Fri Feb 11, 2011 12:12 am
A solid yellow stripe is to be painted in the middle of a certain highway. If 1 gallon of
paint covers an area of p square feet of highway, how many gallons of paint will be
needed to paint a stripe t inches wide on a stretch of highway m miles long? (1 mile =
5,280 feet and 1 foot = 12 inches)
A. (5,280 mt) / 12p
B. (5,280 pt) / 12m
C. (5,280 pmt) / 12
D. (5,280)(12m) / pt
E. (5,280)(12p) / mt


pls tell me that square inches are smaller than inches. i marked c but the ans is a. pls help
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Source: — Problem Solving |

by Night reader » Fri Feb 11, 2011 12:48 am
inch^2>inch :)
area to be painted=t (inches) * m (miles)= (t/12) * (m*5,280)= 5280*mt/12 {area in sq.feet};
inches should be translated into feet and miles need to translated into feet too, as the paint usage is given in square feet; 1 mile =5,280 feet and 1 foot = 12 inches

1 gallon ----> p sq.feet
x gallon <---- 5280mt/12 sq.feet

x=5280mt/12p, the answer is A
alltimeacheiver wrote:A solid yellow stripe is to be painted in the middle of a certain highway. If 1 gallon of
paint covers an area of p square feet of highway, how many gallons of paint will be
needed to paint a stripe t inches wide on a stretch of highway m miles long? (1 mile =
5,280 feet and 1 foot = 12 inches)
A. (5,280 mt) / 12p
B. (5,280 pt) / 12m
C. (5,280 pmt) / 12
D. (5,280)(12m) / pt
E. (5,280)(12p) / mt


pls tell me that square inches are smaller than inches. i marked c but the ans is a. pls help
Join the discussion