Question
Minu wants to have 2 phones. What would be the number of minutes of usage at which it would be economical for her to buy the second phone, such that the number of minutes she uses on each phone are equal?
Answer: Option C
:
C
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C
Ans: Extra cost of the other phone = Rs 330. When she buys a second phone she saves 275*0.8 = Rs 220. the overheads are 330-220=Rs 110.
For each minute above 2000, she will save 20 paise. So by using for 550 minutes, Rs 110 will be saved. Thus at 2550 minutes, both costs are equal. Answer is option (c)
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