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Question : A walks at a speed of 10 km/hr and 20 hours after his start, B starts on his cycle after him at the speed of 15 km/hr. How far from the starting point will B catch A?

Option 1: 600 km

Option 2: 800 km

Option 3: 1000 km

Option 4: 700 km


Team Careers360 9th Jan, 2024
Answer (1)
Team Careers360 10th Jan, 2024

Correct Answer: 600 km


Solution : Distance covered by A = Speed of A ​× Time taken by A . = 10 × 20 = 200 km
Now, Relative Speed B​ = Speed B ​ − Speed A​ = 15 − 10 = 5 km/hr
So,the time taken by B to catch A = $\frac{200}{5}$ = 40 hours
So, the distance covered before A was caught = Speed of A ​× Time taken by B to catch A
= 15 × 40 = 600 km
Hence, the correct answer is 600 km.

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