Question

# Krishna lyer, a motorist uses 24% of his fuel in covering the first 20% of his total journey (in city driving conditions). If he knows that he has to cover another 25% of his total journey in city driving conditions, what should be the minimum percentage increase in the fuel efficiency for non-city driving over the city driving fuel efficiency, so that he is just able to cover his entire journey without having to refuel? (Approximately)

A
39.2%
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B
43.5%
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C
45.6%
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D
41.2%
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Solution

## The correct option is B 43.5%For 45% of the journey in city driving conditions, 54% of the fuel is consumed. Hence, for the remaining 55% journey, 46% fuel is left. Required increase in fuel effciency =5546−45544554×100. = 43.5%

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