not possible to change an area unit into a length unit
Answer: 1 mi² = 2.58998 km²
Answer: 1 km² = 0.386102 mi²
1 square mile = about 2.6 square km (2.58998811 square kilometers).
1 acre = 0.004047 square km, approx
1 hectare is 0.01 square kilometer.
ask your teacher!
Answer: 1 hectare = 0.01 square km
1 acre is 0.0040469 square kilometers.
1 km2 = 1 000 000 m2.
1 acre is 0.004 square km
Square root (1 km^2) = 1 km.
1 square km = 1 million square metres.