Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. **There will be no changes to other Yahoo properties or services, or your Yahoo account.** You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

# The surface of a lake has an area of 15.5 km2. What is the area of the lake in m2?

### 6 Answers

- la consoleLv 72 months ago
area = 15.5 km² → you know that: 1 km² = 1 km * 1 km

area = 15.5 * 1 km * 1 km → recall: 1 km = 1000 m

area = 15.5 * 1000 m * 1000 m

area = 15.5 * 1000 * 1000 * m * m

area = 15.5 * 1000000 * m²

area = 155 * 100000 * m²

area = 15500000 m²

- ?Lv 72 months ago
The surface of a lake has an area of 15.5 km^2.

The area of the lake in m^2 is 15.5 million.

- Daniel HLv 52 months ago
treat units as a variable

15.5 x km^2

find a conversion that you can multiply that doesn't change the value (multiply by 1)

We know that 1km = 1000m so multiply by (1000m/km)^2

15.5km^2 x (1000m/km)^2 = 15500000m^2

15,500,000m^2

- How do you think about the answers? You can sign in to vote the answer.
- llafferLv 72 months ago
Since there are 1000 m per km, and you have square km and want square meters, then we have to square the conversion:

15.5 km² (1000 m/km)² = 15.5 * 1000² m² = 15,500,000 m²