Question #91114
1 Answer
Dec 21, 2016
Explanation:
Let distance from house be
Let correct time be
Time taken is found from the equation
- When walking at
#5kmph#
Let the person take time#t_1" which is "t+10/60=d/5#
#=>60t+10=12d# .......(1) - In the second case, speed is increased by
#1kmph# . Let the person take time#t_2#
#t_2" is "t-15/60=d/6#
#=>60t-15=10d# ......(2)
Subtracting equation (1) from (2) we get