5. A train runs at a speed of 65 km/h for 2
hours, then at a speed of 80 km/h for 90
minutes and finally at a speed of 60 km/h
for 45 minutes. What is the total distance
covered by the train?
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Answer:
Distance travelled in 45- minutes at the speed of 80Km/h=80 x 0.75
= 60-Km
On increasing the speed by 10- Km, the new speed= 90 Km.
So time taken = Distance / Speed =60/90= 2/3- hours
= 2/3 x 60
= 40- minutes
Step-by-step explanation:
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