Q104 of 125 Page 38

Kajol has ₹ 75. This is of the amount she earned. How much did she earn?

Given:

of amount earned is Rs.75

Formula UsedTheory:

Multiplying opposite ratio with given specific value gives

Total amount value

Let the total amount earned by Kajol be X

Then;

If of her earnings is Rs.75

And the complete earning is Rs.X

⇒ of Rs.X is Rs.75

∴ × X = Rs.75

X = Rs.75 ×

X = Rs.200

Conclusion: Kajol earns Rs.200

102

Ravi can walk km in one hour. How long will it take him to walk to his office which is 10 km from his home?

103

Raj travels 360 km on three fifths of his petrol tank. How far would he travel at the same rate with a full tank of petrol?

105

It takes 17 full specific type of trees to make one tonne of paper. If there are 221 such trees in a forest, then

(i) what fraction of forest will be used to make;

A. 5 tonnes of paper.

B. 10 tonnes of paper.

(ii) To save part of the forest how much of paper we have to save.

106

Simplify and write the result in decimal form :