One day Ritesh walked from his house to school at a speed of 4kmph and he reached ten minutes late. The next day he ran at a speed of 8kmph he was five minutes early to school. Find the distance from his house to school
Answers
Given : One day Ritesh walked from his house to school at a speed of 4kmph and he reached ten minutes late. The next day he ran at a speed of 8kmph he was five minutes early to school.
To find : the distance from his house to school
Solution:
Let Say Distance from his house to School = D km/hr
& Time taken = T mins to reach at Time
Ritesh walked from his house to school at a speed of 4kmph and he reached ten minutes late
=> Time taken = D/4 hr = 15D Mins
=> 15D = T + 10
=> T = 15D -10
next day he ran at a speed of 8kmph he was five minutes early to school.
=> Time taken = D/8 hr = 15D/2 mins
15D/2 = T - 5
=> T = 15D/2 + 5
Equating T
15D -10 = 15D/2 + 5
=> 15D/2 = 15
=> D = 2
Distance is 2 km
Time to reach at Time = 20 mins
the distance from his house to school = 2 km
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