Multiple choice

Anil cycles to his school at a speed of 12 km/h and returns home via the same route at a speed of 7 km/h. If the total distance covered during the round trip is 42 km, how long does Anil take to complete the entire journey?

  1. 4 hours and 35 minutes

  2. 4 hours and 40 minutes

  3. 4 hours and 45 minutes

  4. 4 hours and 50 minutes

  5. 4 hours and 55 minutes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total distance is 42 km, so one-way distance is 21 km. Time = (21/12) + (21/7) = 1.75 + 3 = 4.75 hours. 0.75 hours is 45 minutes, so 4 hours and 45 minutes.

AI explanation

Since the total round trip distance is 42 km, the one-way distance to the school is 21 km. Using the formula time equals distance divided by speed, the time taken to cycle to the school is 21 divided by 12, which equals 1.75 hours. The time taken to return is 21 divided by 7, which equals 3 hours. Adding these times gives a total journey time of 4.75 hours, which is equivalent to 4 hours and 45 minutes.

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