A scooter worth ₹80,000 loses 10% of its value every year. After how many whole years will its value first fall below ₹50,000?

Explanation

1. 01

   Values at the end of each year: ₹72,000, ₹64,800, ₹58,320, ₹52,488.

2. 02

   Year 5: $52488 \times 0.9 = ₹47{,}239.20$, the first value below ₹50,000.

3. 03

   So it takes 5 years.