Progress tracking tools for students
FREE Video Lesson Worth $20!
10,000 Math Questions From P1 to P6!
Access 300 Hours of Video Explanations!
Video Tutorials to Tough PSLE Questions!
Step-by-step worked solutions
Sign in / Sign up
Need dedicated, 1-1 help? PSLE A* 2020 1-1 Tuition By Mr SingaporeMathGuru Results Guaranteed!*
Click here to learn more
Roger and Margaret made a journey to a historical site located 864 km away from their city.
Margaret left the city at 7 a.m. which was 1 h 40 minutes earlier than Roger.
However, Roger reached the historical site 2 h 20 minutes earlier than Margaret.
If the average speed of Roger was 72 km/h, find Margaret's average speed.