Question

Rock can read 10 books in 30 minutes. How long does it take

Rock to read 15 books, if the speed is consistent?

Answer 1

45

Explanation:

It takes 30 minutes for 10 so that means that for every 5 books it takes 15 minutes. 5x2=10. 15x2=30. 5x3=15 15x3=45

Answer 2

45minutes

Explanation:

10 books in 30 mins

15 books in ? mins

......................=15/10 × 30

......................= 45 mins