Question

A train travels 65 km per hour for 3 hours and further 2 hours with the speed of 70 km per hour. Then the average speed of the whole journey is :

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Answer 1

Answer:

average speed of the train is 67

Step-by-step explanation:

65×3=195

70×2=140

so, average speed of the train=65+65+65+70+70÷5

so,195+140÷5=67

Answer 2

to find :

average velocity of the train .

given:

the train travelled for 3 hours with the velocity of 65 kmph and for 2 hours with the speed of 70 kmph

solution:

time taken with speed 65 kmph = 3 h

so, distance traveled = 65*3 = 195 km

time taken with speed 70 kmph = 2h

so, distance traveled = 140 km

total time taken = 5h

total distance traveled = 335 km

so, average speed = 335/5 kmph

= 67 kmph