at what time does bob arrive at school?"

Question

every morning bob walks to school. when he is one-fifth of the way to school he looks at his watch and the time is 7:30 am. when he is two-thirds of the way to school he looks at his watch and the time is 7:45 am. at what time does bob arrive at school?"

Answer 1

X = distance to school

 

(2/3 - 1/5)X  = (7/15)X = distance from 7:30 point to 7:45 point

Speed = 4*(7/15)X units/hour

Distance remaining to school at time 7:45 is (1/3)X

 

Time to cover the remaining distance = distance/speed  = (1/3)X / (28/15)X = 5/28 hours = 10.71 minutes

 

Time of arrival at school = 7:55:42seconds am