Practise speed, time & distance for Class 9-10 with timed rounds, instant feedback and difficulty that adapts as you play.
1
Class levels covered
∞
Fresh questions each round
🚗
Mathematics
This topic links speed, time and distance, extending to average speed, relative speed, trains and boats-and-streams problems.
It is one of the highest-frequency arithmetic topics in competitive exams.
Use the harmonic mean: 2ab / (a + b), where a and b are the two speeds.
Add speeds when objects move towards each other, subtract when they move in the same direction.