a vehicle travels a distance in 20 minutes in such a way that in first 10 minutes the Speed is 40 kmph and in last 10 minutes it is 60 kmph. The average speed of the vehicle is?
Answers
Answered by
8
Answer:
50 kmph
Explanation:
In first 10 minutes: As speed is 40 kmph, means it covers 40 km in 1 hr.
→ 40 km in 60 min
→ (40/6) km in 10 min
→ (20/3) km in 10 min
In next 10 minutes: As speed is 60 kmph, means it covers 60 km in 1 hr.
→ 60 km in 60 min
→ (60/6) km in 10 min
→ 10 km in 10 min
Total distance = 10 km + (20/3) km
Total time = 20 min = (20/60)hr = (1/3) hr
Speed = {10 + (20/3)}/(1/3)
Speed = 3(30 + 20)/(3) = 50 kmph
Similar questions