Monica takes 9 hrs 15 minutes in walking a distance and riding back to same place where she started. She could walk both ways in 11 hrs 12 minutes. The time taken by her to ride back both ways is:
Time taken in walking(W) And riding (R) back=
W+R=9 hrs 15 minutes........1
W+W=11 hrs 12 minutes
2W=11 hrs 12 minutes.......2
Multiply 1 by 2
2W+2R=18Â hrs 30 minutes .............3
from 2 and 3
2R=18 hrs 30 minutes-11 hrs 12 minutes
2R=7Â hrs 18 minutes
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