The cost of 40 packets of 12 pens is ₹1680. The cost of 30 packets each containing 9 pens is
Given:
Cost of 40 packets of 12 pens = ₹1680
Find the cost of 30 packets of 9 pens
Formula Used:
Cost per pen = Total cost ÷ Total number of pens
Solution:
Total number of pens in first case
= 40 × 12 = 480 pens
Cost of 1 pen = = ₹3.50
Total number of pens in second case
= 30 × 9 = 270 pens
Total cost = 270 × 3.5 = ₹945
Thus, Cost of 30 packets each containing 9 pens = ₹945
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