Question

The power ratings of several motors are listed in the table.

A 2 column table with 3 rows. The first column is labeled motor with entries, brand X, brand Y, brand Z. The second column is labeled Power in watts with entries 7460, 7650, 7580.
An advertising agency writes marketing material for a new motor (Brand W) that has a power rating of 7,640 W. Which statement comparing the motors can they truthfully use?

Brand W motor can finish any job faster than Brand Y motor can.
There’s not a more powerful motor available.
Brand W motor does more work each second than Brand X or Brand Z.
Every second, Brand W motor does 7,640 N of your toughest work

Answer 1

The only truthful statement is: "Brand W motor does more work each second than Brand X or Brand Z."

Reason: power = work per second (watts). Brand W = 7640 W which is greater than Brand X = 7460 W and Brand Z = 7580 W, so W does more work per second than X or Z.
The other statements are false: Brand Y (7650 W) is slightly more powerful than W, so W cannot finish any job faster than Y and there is a more powerful motor available; and "7,640 N each second" is wrong units (watts are J/s, not newtons).