SOLUTION: Two cars started from the same point, driving along the same road 20 seconds apart for � of a mile to the store. The rate of the first car is 15 mph and the rate of the second car

Question 939201: Two cars started from the same point, driving along the same road 20 seconds apart for � of a mile to the store. The rate of the first car is 15 mph and the rate of the second car is 30 mph. which car will get to the store first?
Found 2 solutions by TimothyLamb, lwsshak3:
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
a = time to the store of first car
b = time to the store of second car
---
s = d/t
t = d/s
---
time to the store of first car:
a = 0.25/15
a = 0.016666666666 hour
---
time to the store of second car:
b = 0.25/30
b = 0.008333333333 hour
but the second car leaves 20 seconds after the first car:
b = 0.008333333333 hour + (20 seconds * 1/(60*60) hour/seconds)
b = 0.013888888888 hour
---
answer:
the second car gets to the store first
---
Free algebra tutoring live chat:
https://sooeet.com/chat.php?gn=algebra
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations with quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Two cars started from the same point, driving along the same road 20 seconds apart for � of a mile to the store. The rate of the first car is 15 mph and the rate of the second car is 30 mph. which car will get to the store first?
***
travel time=distance/speed
let x=travel time of first car
let y=travel time of second car
..
1 hr=3600 sec
x=.25/15*3600=60 sec
y=.25/30*3600=30 sec
Second car gets to store first
First car took 40 more seconds to get to the store after the 20 second head start.
Second car only took 30 seconds to get to the store.
RELATED QUESTIONS
Two cars that started at the same point are driving away from each other. The first car... (answered by stanbon)
leroy started his car at the rate of 50km/hr. one hour later, tina left from the same... (answered by stanbon)
Two cars started from the same point. One traveled north at 55 mi/h and the other... (answered by mananth,Alan3354)
two cars started from the same point. one travels north at 55 mi/h and the other traveled (answered by josgarithmetic)
What is the answer to the following word problem: At 7:30a.m., the Lozano's leave Florida (answered by stanbon)
Hi, can someone help me to solve my problems Problem#1 A man started walking along a... (answered by mananth)
Two cars begin driving from the same point in the opposite directions. The first car... (answered by scott8148)
A car travels along a straight road at a speed of 5 km/h (kilometres per hour). Another... (answered by ankor@dixie-net.com)
Two cars leave the same location at the same time and travel in the same direction along... (answered by rfer)