Tenzin's scooter runs 49.87 km on one litre of petrol. Approximately how far can it travel on 20.13 litres?

Explanation

1. 01

   Round each number to the nearest easy value: $49.87 \approx 50$ and $20.13 \approx 20$.

2. 02

   $50 \times 20 = 1000$ km.