Question

Cost of 20 pens is Rs 180 and cost of 1 dozen pencils is Rs 150. Find the ratio of cost of a pen to cost of a pencil.

Answer 1

Answer:

18:25

Step-by-step explanation:

Cost of 20 pens = Rs180

Cost of 1 pen = Rs180/20 = Rs9

    1 dozen = 12

Cost of 12 pencils = Rs150

Cost of 1 pencil = Rs150/12 = Rs12.5

Ratio of cost of pen to cost of pencil =9/12.5 = 90/125 = 18/25 = 18:25