Question

If the cost of 6 pens is Rs. 172.50, find the cost of 10 pens.​

Answer 1

CP = 11 pens for 10 = 10/11

SP = 10 pens for 11 = 11/10

SP > CP

GAIN PERCENTAGE = (SP-CP)*100/CP

= (11/10-10/11)*100 / (10/11)

= (121-100)/110 * 100 * 11/10

= 21%

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Answer 2

Answer:

cost of 6 pens= ₹172.50

cost of 1 pen=₹172.50÷6=₹28.75

cost of 10 pens=₹28.75×10=₹287.5

Explanation:

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