Answer:
40 books and 3 months
Explanation:
b= books
15b=9months
1 month =15/9=5/3
24 months =24×5/3
24 months =8×5=40 books
1b=9/15
1b=3/5
5b =3/5×5
5b=3
it would take him 3 months to read 5 books
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