SCIENCE question?????

Question

If a litre of something will give you 3 watt hours, will 50 litres burned at the same rate give you 150 watt hours or 3 watt hours for 50 times longer?

Answer 1

yes.

Answer 2

150 watt hours.

A watt-hour means 1 watt for one hour.

150 watt hours would be equivalent to one watt for 150 hours, 15 watts for 10 hours, etc.  It is a measurement of energy use or production.