Question

If 15 pens costs rs.9, then what will be the cost of 22pens?

Answer 1

15 pens cost= rs.9

1 pen= 9/15

22 pens= 9/15*22=66/5=rs. 13.2/-

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Answer 2

cost of one pen=9/15
=0.6₹

cost of 22pens =0.6×22
=13.2