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5. The operating cost of a truck is 12+x/6 per km, when the truck travels x km/hour. If the the driver earns 6 Rs per hour, what is the most economical speed to operate the truck on a 400 km road. Also due to construction,the truck can travel only between 35 and 60 km/hour? |
| Answer» 5. The operating cost of a truck is 12+x/6 per km, when the truck travels x km/hour. If the the driver earns 6 Rs per hour, what is the most economical speed to operate the truck on a 400 km road. Also due to construction,the truck can travel only between 35 and 60 km/hour? | |