Question

There are two pipes a and b. If a fills 10 litres per hour, bs filling rate doubles after every hour starting with 10 litres in first hour (i.E. 10, 20, 40, 80, 160 litres and so on per hour). If b filled in 1/16 of a tank in 3 hours, how many hours will it take to fill the tank completely?

Answer 1

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