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Paying for a birthday cake

The question

Arun and Lina paid for a birthday cake together in the ratio 1 : 3. The cake cost $72. How much did Lina pay for the cake?

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Answer

$54

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Episode 1 · Now playing

Paying for a birthday cake
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Episode 2

A litre of water in two bottles
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Episode 3

Sharing $396 in the ratio 5 to 13
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Episode 4

A wire cut in the ratio 5 to 4