A bicycle travels 25 km in 1 hour 20 minutes. If it travels at the same speed, how long will it take to travel 45 km? (Answer in hours and minutes.)

Step-by-step solution

1. Convert the given time to hours: 1\,h 20\,min = 1 + 20/60 = 1.333\,h.
2. Calculate speed: $v=\frac{25\text{ km}}{1.333\text{ h}}=18.75\text{ km/h}$.
3. Find time for 45 km: $t=\frac{45\text{ km}}{18.75\text{ km/h}}=2.4\text{ h}$.
4. Convert 0.4 h to minutes: 0.4 × 60 = 24 min.
5. Hence the required time is 2 h 24 min.

Concept tested: Speed calculation and time conversion

Published 13 October 2026 · How this solution was prepared and checked