Due to more demand of ball pen, its price increases by 50 paisa every year, whereas due to less demand of fountain pen, its price remains fixed every year. If in 2011, the price of a ball pen was Rs. 8 and that of a fountain pen was Rs.12, then in which year will the cost of a ball pen be equal to that of a fountain pen?
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Answer:
2019
Step-by-step explanation:
fixed price of fountain pen=12Rs
increase in price of ball pen every year=50paise
its price in 2011=8Rs
A/Q 12-8=4Rs
4Rs=400paise
400/50=8
that means it would take 8 years from 2011 to make the price equal to the fountain pen =2011+8years
=2019
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