SOLUTION: Cars A and B travel down the same road. A's speed
is r km/h and B's speed is s km/h (A's speed is less than B's)
When will B overtake A? t=A's time.
1. A and B start at the
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-> SOLUTION: Cars A and B travel down the same road. A's speed
is r km/h and B's speed is s km/h (A's speed is less than B's)
When will B overtake A? t=A's time.
1. A and B start at the
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Question 873552: Cars A and B travel down the same road. A's speed
is r km/h and B's speed is s km/h (A's speed is less than B's)
When will B overtake A? t=A's time.
1. A and B start at the same time but A starts p km in front of B.
2. A and B start in the same place but A starts q hours before B.
Thank you. Answer by josgarithmetic(39614) (Show Source):
You can put this solution on YOUR website!
t = UNKNOWN time
r = speed of carA
s = speed of carB
Conditions Number 1: Same departure location, A starts p kilom ahead of B.
This means car A is starting at a position p, and while traveling, position becomes p+rt.
Basic Rule: RT=D for rate, time, distance.
WHICH CAR___________Speed________time_______distance
A___________________r____________t__________p+rt
B___________________s____________t___________st
The variable t is to be the same value for when B overtakes A and is unknown. The distance expressions must be equal when B overtakes A, and this equality uses only the unknown of t.
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