Given:
It is 2.1 km from Mary's house to the nearest mailbox.
To Find:
How far is it in metres.
Conversion:
1 km = 1,000 m
2 km = 2 × 1,000 = 2,000 m
Solution:
2.1 km = ( 2,000 + 100 ) m = 2,100 m
Answer:
2,100 m
Therefore, It is 2,100 metre far away from Mary's house.