# A truck travels 90 km/hr for the first 1 1/2 hours. After that it travels 70 km/hr. Find the time taken by the truck to travel 310 kilometers

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by Nazee

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by Nazee

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The Brainliest Answer!

distance travelled = 90*3/2 = 135 km

total distance = 310km

After that it travels 70 km/hr.

So distance travelled at 70km/hr= 310-135 = 175km

time = distance/speed = 175/70 = 5/2 hours

total time = 3/2 + 5/2 = 8/2 = 4 hours

distance traveled when it traveled 90kn/h= 90*3/2=135

distance left=310=135=175

therefore time taken to cover 75km=175/70=2 1/2 hours.

total time =11/2 + 2 1/2 = 4 hours

i hope this helps u...