Answer:
740 words.
Explanation:
We will solve this problem with unitary method.
∵ Bart can type the number of words in 8 minutes = 296
∴ Bart can type the number of words in 1 minute =

∴ Bart can type the number of words in 20 minutes =

=

=

= 740 words
Bart can type 740 words in 20 minutes.