R S Aggarwal Solutions for Chapter: Ratio and Proportion, Exercise 2: EXERCISE 8B

If the third proportional to $7$ and $x$ is $28$, find the value of $x$.

Find the mean proportional between:

$6 and 24$
 

Find the mean proportional between:

$3 and 27$

Find the mean proportional between:

$0.4 and 0.9$

What number must be added to each of the numbers $5, 9, 7, 12$ to get the numbers which are in proportion?

What number must be subtracted from each of the numbers $10, 12, 19, 24$ to get the numbers which are in proportion?

The scale of a map is $1 : 5000000.$ What is the actual distance between two towns, if they are $4 cm$apart on the map?

At a certain time a tree $6 m$high casts a shadow of length $8 metres$. At the same time a pole casts a shadow of length $20 metres.$Find the height of the pole.