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Multiple Choice Questions

A candle of 8 cm long burns at the rate of 7 cm in 7 hour and another candle of 10cm long burns at t...........

Quantitative Aptitude (IB) Time and work

A candle of 8 cm long burns at the rate of 7 cm in 7 hour and another candle of 10cm long burns at the rate of 6 cm in 3 hour. What is the time required by each candle to remain of equal lengths after burning for some hours, when they start to burn simultaneously with uniform rate of burning?

5 cm

3 cm

1 cm

2 cm

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