1.

If the cost of 3 ball pens is ₹ 15, then what is the cost of 6 such pens?

Answer»

3 : 15 : : 6 : cost 

Cost x 3 = 15 × 6

∴ Cost = \(\frac {15\times6}{3}\) = ₹ 30

cost of 3 ball pens =15₹
the cost of 6 such pen =?

=15×6÷3
=90÷3
=30

cost of 6 pens is 30₹




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