W.K.T 1 km = 1000 m
Distance travelled by bus = 15km 268m
= (15 + 268/1000)km
= 15.268 km
Distance travelled by car = 7 km 7m = (7 + 7/1000) km
= 7.007 km
Distance by on foot = 500 m = 500/1000 m = 0.500 km
Total distance of school from her residence is