How high can you raise a kilogram of sugar with 1 kWh of electrical energy? (To 2 s.f in kilometres)

The first thing to recognise is that the terms 'sugar' and 'electrical' are there to confuse you - the substance raised and the type of form of energy used to raise it are not important to the question.
This is ultimately a question of equating energies, E_p as potential energy of the sugar and E_e the electrical energy used to raise it. We know that the gravitational energy of the sugar after raising it will be equal to 1 kWh, so we look to express this in a unit that is more useful, Joules.
1 kWh is the energy output of 1000 Watts of power for 1 hour (6060 seconds). As 1 Watt is 1 Joule / second, we find that:E_e = (1000)(60)(60) = 3,600,000 J
The potential energy of the sugar after raising it to a height h is: E = mg*h
We have m = 1kg and g = 9.8 m/s/s .
Therefore with E_p = E_e we have:
3,600,000 = (9.81)*hh = 367.3469... km
To 2 s.f this is rounded to: h = 370 km