train running at a speed of 80 kilometre per hour can cover a certain distance in 45 minutes how long will it take to cover the same distance if its speed is increased by 20 km per hour
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train running at a speed of 80 kilometre per hour can cover a certain distance in 45 minutes how long will it take to cover the same distance if its speed is increased by 20 km per hour
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36 minutes
Step-by-step explanation:
train speed = 80km / hr
60 min time, train moved = 80 km
45 min time, train moved = 80/60 ×45 = 60 km
New speed = 100km/hr
train to reach distance 100km, taking time = 60min
train to reach distance 60km taking time
= 60/100 ×60= 36 minutes