Speed P6

Toy Train A and Toy Train B are 15 m apart from each other. When the toy trains moved towards each other, they would meet in 5 min. However, if the toy trains moved in the same direction, toy Train A would overtake Toy Train B in 5/12 h. Find the speed of Toy Train A and Toy Train B.


5/12 h = 25 min

          5 min
            <><----- 25 min--->
B         [   ][   ][   ][   ][   ][   ]
A [   ][][   ][][   ][][   ][][   ][]
    <15 m >
   5 min                                     [   ][]
   <------- 25 min ---------->

2 [   ] + [] --> 15 m

5 [   ] --> 3 [   ] +  4 []
2 [   ] --> 4 []

5 [] --> 15
[] --> 15 ÷ 5 = 3 m

[   ] --> 2 x 3 = 6 m

6 ÷ 5 = 1.2 m/min

9  ÷ 5 = 1.8 m/min

The speed of Toy Train A and Toy Train B are 1.8 m/min and 1.2 m/min respectively.