When n liters of fuel was added to a tank that was already 1/3 full, the tank was filled to 7/9 of its capacity. In terms of n, what is the capacity of the tank, in liters?

Correct answer marked below

10/9 n

4/3 n

3/2 n

7/3 n

9/4 n

Correct

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Comments

Shoilayee1h ago

thanks, this one clicked pretty fast once I set the capacity equal to some variable.

DesignSep 7

wait why is it 9/4 and not 7/3? I keep getting mixed up with the fractions

ShobhitSep 18

you have to subtract the 1/3 that was already in there first, that's where I messed up too

IshanSep 21

same lol. took me a second to realize the n only fills the empty part

NicolasJul 8

Easy one. Just find the difference between 7/9 and 1/3 and that's the fraction n represents.

VigneshApr 19

is this really sub-505? the fraction subtraction tripped me up ngl

What this question tests

Your ability to convert between fractions, ratios, and decimals and to reason proportionally.

Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.