Class 8 Maths – Chapter 13
Direct and Inverse Proportions
STEP 4: Worksheet (Practice Questions)

Section A – Direct Proportion

1. If 6 notebooks cost ₹180, find the cost of 10 notebooks.
2. A car travels 150 km in 3 hours. How far will it travel in 7 hours?
3. 15 kg of rice costs ₹675. Find the cost of 4 kg of rice.
4. If 9 pens cost ₹135, how many pens can be bought for ₹300?
5. 12 litres of petrol runs a bike for 360 km. How far will 20 litres run?

Section B – Inverse Proportion

1. 10 workers can finish a work in 18 days. How many days will 15 workers take?
2. 6 taps can fill a tank in 10 hours. How long will 12 taps take?
3. 20 men can build a wall in 12 days. How many men are required to build it in 8 days?
4. 8 machines can manufacture goods in 15 days. How many days will 5 machines take?
5. 5 buses are required to carry 250 students. How many buses are required for 400 students?

Section C – Identify the Type of Proportion

1. Speed and time (distance fixed)
2. Number of workers and days
3. Cost and quantity of items
4. Number of taps and time taken
5. Distance and fuel consumed

✏️ Instructions for Students:
• First identify the type of proportion
• Write the formula clearly
• Solve step-by-step
• Write final answer with units