Understand the concept
Direct proportion grows together; inverse decreases as the other increases.
4 pens cost ₹60. Cost of 6?
- Step 1: Cost per pen 60/4=15
- Step 2: times 6.
Final answer: ₹90
2 pens cost ₹20. Cost of 5?
Show the answer
₹50
Try another similar question and explain each step aloud. Refer to your school syllabus for topic level and notation.