If the cost of 40 pens is Rs 600, What is the amount required to purchase 4 dozen pens?​

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1. Answer:

   cost of 40 pens = rs. 600

   cost of 1 pen =600/40

   =15

   Now cost of 4 dozen pen

   1 dozen = 12

   therefore, 4 dozen = 4 × 12

   =48

   = 48 × 15 = Rs. 720

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