Question

Add:
3800 m + 4 km = ____.

• A. 7800 m
• B. 3804 m
• C. 78 km
• D. 4200 m

Answer 1

The correct option is A 7800 m

3800 m + 4 km

From the conversion table we see that,

To convert a larger unit (km) to a smaller unit (m) we multiply by the conversion factor.

So, 3800m + 4000m (1km = 1000m therefore 4km = 4 $\times$1000 = 4000 km)

= 7800 m

Answer option A. 7800m