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Applied Mathematics · 2023 · 2 marks
Numbers, Quantification and Numerical ApplicationsNumerical Problems (Boats and Streams, Pipes and Cisterns, Races and Games)2 marks
CBSE 2023 · Central · Set 4 · Q21
(a) Two pipes A and B can fill a tank in 24 minutes and 32 minutes respectively. If both the pipes are opened simultaneously, after how much time…
(a)
Two pipes A and B can fill a tank in $\displaystyle 24$ minutes and $\displaystyle 32$ minutes respectively. If both the pipes are opened simultaneously, after how much time should B be closed so that the tank is full in $\displaystyle 18$ minutes?
OR
(b)
In a one-kilometre race, A beats B by $\displaystyle 30$ seconds and B beats C by $\displaystyle 15$ seconds. If A beats C by $\displaystyle 180$ metres, then find the time taken by A to run $\displaystyle 1$ kilometre.
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