Solving a Motor Lift Problem: Find Out What You Need to Do

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I can't solve this problem, please help me.

How long will it take a 1780 W motor to lift a 252 kg piano to a sixth-story window 15.8 m above?
what do i have to do?
 
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Liatana said:
I can't solve this problem, please help me.

How long will it take a 1780 W motor to lift a 252 kg piano to a sixth-story window 15.8 m above?
what do i have to do?

What is the definition of power? Write it down and I'm sure you'll make progress.

Edit: you may find this useful: http://www.glenbrook.k12.il.us/gbssci/phys/CLass/energy/u5l1e.html" .
 
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Liatana said:
you mean p=W/t?

Yes, I mean P = W / t. Now, what does the work equal?