Question
Dexter and Prexter are competing with each other in a friendly community
competition in a pool of 50m length and the race is for 1000m. Dexter
crosses 50m in 2 min and Prexter in 3 min 15 sec. Each time they
meet/cross each other, they do handshake's. How many such handshake's
will happen if they start from the same end at the same time?
Dexter and Prexter are competing with each other in a friendly community
competition in a pool of 50m length and the race is for 1000m. Dexter
crosses 50m in 2 min and Prexter in 3 min 15 sec. Each time they
meet/cross each other, they do handshake's. How many such handshake's
will happen if they start from the same end at the same time?
Answer: Option B
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When Dexter completes second round, they do handshake once.
Now for every round which Dexter completes, there will be
one hand shake as the ratio of speed is 13:8.
D and P will meet at the pool end only after D completes
26 rounds.
In the 20th round, D finish the race and the total handshake's will be:
20−1=19
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