Two air planes are moving in the same direction at 29 kmph and 11 kmph. The faster air plane crosses the slower air plane in 10 seconds. Find the length of the faster air plane in meters.
Choose one:
A) 36 m
B) 71 m
C) 42 m
D) 50 m
E) 59 m
Relative speed = (29 - 11) * 5/18= 
<gadget id="calculator">(29 - 11) * 5/18</gadget>
<output>5</output>
5= 5 mps.   Distance covered in 27 sec = 10 * 5= 
<gadget id="calculator">10 * 5</gadget>
<output>50</output>
50 m.   The length of the faster train= 50 m.   Answer:50 m
<result>D</result>
Two air planes are moving in the same direction at 29 kmph and 11 kmph. The faster air plane crosses the slower air plane in 10 seconds. Find the length of the faster air plane in meters.