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by NareshCS » Thu Feb 19, 2009 10:13 pm
The mileage of the car decreases proportionately if its speed is more than 60mph. travelling with the speed of 60 mph, the car can travel 150 miles with 2 gallons of gas. what is the maximum distance the car can travel travelling with a speed of 80 mph with 4 gallons of gas.

A. 150miles
B. 200miles
C. 225miles
D. 240miles
E. 300miles

it was given OA as C,
:?: :?: :?:
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by cramya » Thu Feb 19, 2009 10:37 pm
Travelling at 60 miles per hour the miles pergallon = 150/2 = 75

Let x be the miles per gallon wiht 80 mph (x should be less than 75 based on The mileage of the car decreases proportionately if its speed is more than 60mph)


So 60 * 75 = x * 80

x= 225/4

225/4 miles per 1 gallon

For 4 gallons it is 225/4*4 = 225 miles

Hence C
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by naaga » Fri Feb 20, 2009 6:05 am
for 2 gallons it travels 150 miles

consecutively with 1 g it travels 75 mi when it is traveled at 60 m/h


1 ---> 75

.75 * 4 ----> X ( why here .75 ? because 60 m/h is 3/4 of 80 m/h,hence .75 )

X= 75 * .75 * 4 =225

Hence ans is C
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