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Hi, I asked this question earlier, but didn't get any replies. If anybody could help, it would be extremely appreciated!

A 225 kg box is loaded onto a truck by pulling it up an inclined plane (10 m hypotenuse difference) by a force that is parallel to the incline (T = 315 N). If the bed of the truck is 1.2 m above the ground what is the efficiency of this simple machine in loading the box into the truck?

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