Answer:
110km
Explanation:
If she walks 18km on the first day and each day since, she walked 90percent of what she walked the day before.
Second day = 90% of 18km
Second day = 90/100× 18
= 16.2km
Third day = 90% of distance walked second day
Third day = 90/100 × 16.2
= 14.58km
Fourth day = 0.9× 14.58
= 13.12km
Fifth day = 0.9×13.122 = 11.81km
Sixth day = 0.9×11.81 = 10.63km
7th day = 0.9×10.63 = 9.57km
8th day = 0.9×9.57 = 5.74km
9th day = 0.9×5.74 = 5.17km
10th day = 0.9×5.17 = 4.65km
At the end of the 10th day, the total distance covered will be sum of all the distances
= 18+16.2+14.58+13.12+11.81+10.63+
9.57+5.74+5.17+4.65
= 109.47km
= 110km to nearest kilometers