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Cost of a dozen gel pen is 290 and the cost of 7 ball pens is 210. Find the ratio of the cost of a gel pen to ball pen.
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cost of dozen(12) Gel pens = Rs. 290
Cost of 1 Gel Pen= 290/12 = Rs. 145/6
Cost of 7 ball pen = Rs.210
Cost of 1 ball pen= rs.30
Ratio of Gel Pen:Ball pen
= (145/6):30.
cross multiply by6
145:(30x6)
=145:180
= 29:36. (dividing both by 5)
Cost of 1 Gel Pen= 290/12 = Rs. 145/6
Cost of 7 ball pen = Rs.210
Cost of 1 ball pen= rs.30
Ratio of Gel Pen:Ball pen
= (145/6):30.
cross multiply by6
145:(30x6)
=145:180
= 29:36. (dividing both by 5)
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