SOLUTION: Two boys, A and B, start from the same place and run in opposite directions. A's speed is twice that of B's. At the end of 2 hours, they are 30km apart. Find their speeds.
Algebra ->
Customizable Word Problem Solvers
-> Age
-> SOLUTION: Two boys, A and B, start from the same place and run in opposite directions. A's speed is twice that of B's. At the end of 2 hours, they are 30km apart. Find their speeds.
Log On
Question 807984: Two boys, A and B, start from the same place and run in opposite directions. A's speed is twice that of B's. At the end of 2 hours, they are 30km apart. Find their speeds. Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! let B's speed be x
A's speed = 2x
they are moving away from each other
combined speed = 3x
d/r = t
30/3x= 2
6x=30
x=5
their speed are 5 & 10km/h
