39 packets of 12 pens each costs ₹ 374.40. Find the cost of 52 packets of 10 pens each.
Number of pens in 1 packet = 12
Number of pens in 39 packets = 12 × 39 = 468
Number of pens in 1 packet = 10
Number of pens in 52 packets = 10 × 52 = 520
Now cost of 468 Pen = ₹ 374.40