Question

Cost of a dozen pens is ₹ 180 and cost of 8 ball pens is ₹ 56. Find the ratio of the

cost of a pen to the cost of a ball pen. [1 ½ m]

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Answer 1

Ratio of cost of a pen to cost of a ball pen is 15:7

Explanation:

Given that:

Cost of dozen pens = ₹180

Unit rate =
`(180)/(12)`

Unit rate = ₹ 15 per pen

Cost of 8 ball pens = ₹ 56

Unit rate =
`(56)/(8)`

Unit rate = ₹7 per ball pen

Ratio of cost of a pen to cost of a ball pen,

15 : 7

Hence,

Ratio of cost of a pen to cost of a ball pen is 15:7