Travel by bus = 15 km 268 m= 15.268 km (we know that 1 km = 1000 m)
Travel by car = 7 km 7 m = 7.007 km
Travel on foot = 500 m = 0.500 km
Total distance travelled =
15.268 km
7.007 km
+ 0.500 km
= 22.775 km
Therefore, Sunita's school is 22.775 km from her residence.