Question

A 700-watt gasoline engine and a 300-watt electric mother. Which machine can do more work faster?

Answer 1

-- The 700-w engine can do more work than the 300-w mother
in the same time.

-- The 700-w engine can also do the same amount of work as
the 300-w mother in less time.

-- The 300-w mother can do the same amount of work as the
700-w engine can, but it takes 2.33 times as long to do it.