A and B start at the same time to reach the same destination. B travelled at 4/5 of A's speed and reached the destination 1 hour 20 minutes after A. What was the time taken by B to reach the destination?

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Q: 121 (CAPF/2024)
A and B start at the same time to reach the same destination. B travelled at 4/5 of A's speed and reached the destination 1 hour 20 minutes after A. What was the time taken by B to reach the destination?

question_subject: 

General Knowledge

question_exam: 

CAPF

Let time taken by A be t hours. Therefore, by B’s speed relation, t/0.8 = t + 4/3 solving gives, t=4 hours. Hence, B takes 5 hours (4+1/3 of 4 hours).