A boat travels $42$ km downstream and $42$ km upstream with speeds $14$ km/h and $7$ km/h respectively. The total time taken is:
Practice this question from Chapter Mock 9: Boat and Stream, with options and an explanation.
Question
A boat travels $42$ km downstream and $42$ km upstream with speeds $14$ km/h and $7$ km/h respectively. The total time taken is:
Option A
7 hours
Option B
8 hours
Option C — Correct answer
9 hours
Correct choice.
Option D
10 hours
Explanation
Time $=42\div14+42\div7=3+6=9$ hours.