Exercise 8B
Question 1
1. Which ratio is greater?
(i) $5: 7$ or $8: 11$
(ii) $11: 21$ or $13: 25$
(iii) $9: 16$ or $15: 22$
2. Jai's class has 8 boys and 10 girls. Ashu's class has 6 boys and 8 girls. Which class has a higher ratio of boys to girls?
3. The ratio of boys to girls in a class is $3: 2$. If there are 33 boys, how many girls are there?
4. The ratio of the number of Sonia's beads to the number of Nandini's beads is $5: 7$. If Sonia has 65 beads. how many beads does Nandini have?
5. The length and breadth of a class room are in the ratio $3: 5$. If the breadth of the room is $20 \mathrm{~m}$, find the length?
6. Bela and Reena share a reward of $₹ 150$ in the ratio $2: 3$. How much does Reena get?
7. Parul, Daisy and Mrinal share 60 sweets in the ratio $9: 7: 4$. How many sweets does Daisy receive?
8. A wire of length $88 \mathrm{~cm}$ is cut into three pieces. The lengths of the pieces are in the ratio $2: 3: 6$. Find the length of the (i) shortest piece (ii) longest piece.
9. (i) Increase $₹ 540$ in the ratio $6: 7$
(ii) Decrease $440 \mathrm{~kg}$ in the ratio 11: 5
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