O P Malhotra, S K Gupta and, Anubhuti Gangal Solutions for Chapter: Ratio and Proportion, Exercise 2: Exercise

Find the mean proportional between

$81 \mathrm{and} 100$

Find the mean proportional between

$0.32 \mathrm{and} 0.08$

Find the mean proportional between

$\frac{7}{11} \mathrm{and} \frac{9}{308}$

Two friends bought a house for $₹ 45,00,000$. Neeraj paid $₹ 20,00,000$ and sanjeev paid the rest. Three years later they sold the house for $₹ 63,00,000.$ How much should Neeraj receive from the sale?

If $25$ persons can dig a trench $36$ $\mathrm{m}$ long in one day, then find the number of persons required to dig a trench $108 \mathrm{m}$ long in one day.

Twelve people can clean an office building in $3$ hours. How long would it take for $4$ people?

The ratio of areas of two squares is $4 : 5$. If the area of the bigger square is $475 {\mathrm{cm}}^2$, what is the total surface area of the both squares?

Jaya has two maps, Map A and Map B. The Map scale of Map A is $1 : 25000$ and Map B scale is $1 : 10000$. On Map B the distance between Town X and Town Y is $16 \mathrm{cm}$. What is the distance between two towns on a Map A.