Question

Six smart people can read 12 books in 6 hours. How many books can three of these smart people read in nine hours?

Answer 1

1 person=2books/hour

3 person=9books/(3/2)hour

Answer 2

Given,

Six smart people can read 12 books in 6 hours.

To find,

The number of books that 3 smart people can read in 9 hours.

Solution,

We can easily solve this mathematical problem by using the normal arithmetic method.

Now, according to the question,

6 people can read in 6 hours = 12 books

1 people can read in 6 hours = 12/6 books

1 people can read in 1 hour = 12/36 books

3 people can read in 1 hour = 12×3/36 = 36/36 books

3 people can read in 9 hours = 36/36 × 9 = 9 books

Hence, 3 smart people can read 9 books in 9 hours.