Question

Julie left home for examination centre at 9:00 amand the reporting time was 10:15 am. After drivingfor half an hour at an average speed of 20km/hr,she realized that she would get late so she increasedher speed by 40% and reached exactly on reportingtime. What is the distance of the examination centrefrom Julie's home?​

Answer 1

Answer:

31 km

Explanation:

First part of journey

speed = 20 kmph

time = 0.5 hours (30 min = 0.5 hours)

distance = speed x time = 10km

Second part of journey

speed = 28 kmph (40% of 20 = 8; add 20)tannc

time = 45 minutes = 0.75 hours (10:15 - 9:30)

distance = speed x time = 21 km

Total distance = 10km + 21km = 31km