Home » Aptitude » Speed, Time and Distance » Question
  1. A walks at a uniform rate of 4 km an hour; and 4 hours after his start, B bicycles after him at the uniform rate of 10 km an hour. How far from the starting point will B catch A ?
    1. 16.7 km
    2. 18.6 km
    3. 21.5 km
    4. 26.7 km
Correct Option: D

Distance covered by A in 4 hours = 4 × 4 = 16 km
Relative speed of B with respect to A = 10 – 4 = 6 km/hr
∴  Time taken to catch A

=
16
=
8
hours
63

∴ Required distance =
8
× 10 =
80
33

= 26.67 km. ≈ 26.7 km


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