Answer:
he can type about 51 words in 90 seconds because
use proportion
7x = 360
x = 51 3/7
x is about 51
Explanation:
51 words
20words=35 seconds
? =90 seconds
Cross multiplication to get
(90×20)/35
1800/35
51.42
Meaning he can type 51 words in 90 seconds
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