5. Cost of a dozen pens is 108 rupees and cost of 7 ball pen is 49 rupees. Find the ratio of the cost
of a pen to the cost of a ball pen?
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Answer:
Ratio of cost of a pen to the cost of a ball pen is 9:7
Step-by-step explanation:
Given,
cost of dozen pens = ₹ 108
cost of one pen = ₹(108 ÷ 12). { 1 dozen = 12 units }
= ₹ 9
cost of 7 ball pens = ₹ 47
cost of 1 ball pen = ₹ (47÷7)
= ₹ 7
Ratio of cost of one pen to a one ball pen
= 9/7
= 9:7
Hence, Ratio of cost of a pen to the cost of a ball pen is 9:7
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