A boy leaves for school at 10:40 a.m. He spends 5 hrs in school and comes back at 5:20 pm on the same day. He travels at a constant speed of 1.4 km/hr. How far away is his school?
(I tried to use 1.4kmph as average speed and thus got total distance as 2.3 km but I think that answer is wrong)
Answers
Answer: boy leaves for school at 10:40 a. m. spends 5 hours and comes back at 5:20 p. m.
so the total time he was out is 6 hours and 40 minutes that is 6*60 minutes = 360 min + 40 min = 400 minutes and
5*60 minutes spent in school =300 min
so time he traveled is 100 minutes
traveling time in seconds is 100 * 60 = 6000
now speed in m/s is 1.4 * 5/18 = 0.38 m/s
speed = distance / time
0.38*6000 = distance = 2280 meters
that is 2.28 km
Answer:
1.165 km
Step-by-step explanation:
10:40 to 5:20 is 6 hour 40 minut time.
5 hour spend at school.
total time for travel is 1 hour 40 minit(100 minit)
speed 1.4 km/hr. (0.0233km/minit)
speed =distance/time
distance =speed×time
=0.0233×100
=2.333 km
now he travels 2 times for go to school and come back to home
so home to school distance=2.333/2=1.1665 km