Q4 of 48 Page 101

The compound ratio of 3:4 and the inverse ratio of 4:5 is 45:x. Find x.

The compound ratio of 3:4 and the inverse ratio of 4:5 = 45:x

The inverse ratio of 4:5 = 5:4


Here from the given ratios, a = 3,b = 4,c = 5 and d = 4.Then



If a:b and c:d are any ratios, then their compound ratio =


So, ac:bd


⇒


⇒


⇒


⇒


⇒ X = 48


∴ The Value of X is 48


More from this chapter

All 48 →
2

If the compound ratio of 5:8 and 3:7 is 45:x. Find the value of x.

 3

If the compound ratio of 7:5 and 8:x is 84:60. Find x.

 5

In a primary school there shall be 3 teachers to 60 students. If there are 400 students enrolled in the school, how many teachers should be there in the school in the same ratio?

 6

In the given figure, ABC is a triangle. Write all possible ratios by taking measures of sides pair wise.

(Hint: Ratio of AB:BC = 8:6)