A truck covers 30km at a uniform speed of 30km/hr what should be it's speed for the next 90km if the average speed of the journey is 60km/hr
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Total distance covered= (30 + 90)km = 120km
Time required to cover 30 km at 30km/hr
= ( 30/ 30)hr = 1 hr
Average speed of the entire journey= 60km/hr
Total time required for the journey= (120/ 60)hr = 2 hrs
Therefore,time required for the next 90 km= (2-1) hr = 1 hr
Therefore speed of the truck for the next 90km= (90/ 1) km/ hr = 90 km/hr
Time required to cover 30 km at 30km/hr
= ( 30/ 30)hr = 1 hr
Average speed of the entire journey= 60km/hr
Total time required for the journey= (120/ 60)hr = 2 hrs
Therefore,time required for the next 90 km= (2-1) hr = 1 hr
Therefore speed of the truck for the next 90km= (90/ 1) km/ hr = 90 km/hr
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