Question

Question 62

In a school, the ratio of the number of large classrooms to small classrooms is 3:4. If the number of small rooms is 20, then find the number of large rooms.

Answer 1

Given, the ratio of number of large classrooms to small classrroms = 3 : 4
And the number of small classrooms = 20
Let the classrooms be multiple of x.
So, number of large classrooms = 3x
And number of small classrooms = 4x
According to the question, $4x=20x=\frac{20}{4}=5$
Hence, number of large classrooms = 3x = $3\times 5=15$