The price of article A increases by Rs. 40 every year while the price of article B increases by Rs. 15 every year. If in 2015 the price of article A was Rs. 420 and that of article B was Rs. 630, then in which year will article A cost Rs. 40 more than article B?
A2022
B2023
C2025 ✓ Correct
D2024
Correct answer: (C) 2025
Explanation
Article A costs Rs. 40 more than B in the year 2025.
After n years, price of A = 420 + 40n and price of B = 630 + 15n.
Set A = B + 40: 420 + 40n = 630 + 15n + 40.
25n = 250, so n = 10.
2015 + 10 = 2025.
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