Question

a train crashes after running for 6 hours due to which it moves ahead of it by 2/3 of its normal speed and arrives at its destination 35 minutes later. had the accident happened after 200 km, the train would have reached its destination only 15 minutes later. find the normal speed of the train​

Answer 1

Key Formulas:

1. Distance = Speed × Time

2. Speed=DistanceTime

3. Time=DistanceSpeed

4. To convert kilometers per hour (kmph) into meters per second (m/s), multiply with 518

5. To convert meters per second (m/s) into kilometers per hour (kmph), multiply with 185

6. If the ratio of speeds is a : b : c, then the ratio of times taken is = 1a:1b:1c

Average Speed:

7. Average speed = Total distance travelledTotal time taken

8. A person travels from A to B and then returns to A at speeds x and y, then the average speed of the entire journey = 2xyx+y

9. A person travels from P to Q and then goes from Q to R taking equal times with speeds x and y, then the average speed of the entire journey =