Ram, Jai, Gaan and Shiva are friends. They went on a picnic to a nearby hill. While they are returning back they found a old wooden bridge which can withstand only two.
Sun is about to set down and becoming dark. The only torch light they are having can glow only for 15 min.
Each one is having different speed time to cross the bridge.
Ram takes 8 min. Jai 5 min, Gaan 2min. and Shiva 1 min.
They successfully crossed the bridge within the life time of the torch.
How?
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We know that torch can glow for 15mis. So 8+5+2+3= 15
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