A train passes a station platform in 32 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?  Choices.
A) 160 B) 180 C) 200 D) 220 E) 240
The speed of the train is 54 * 5/18 m/s = 15 m/s   The length of the train is 15 x 20 = 300 m   platform + 300 = 15 * 32= 
<gadget id="calculator">15 * 32</gadget>
<output>480</output>
480 - 300= 
<gadget id="calculator">480 - 300</gadget>
<output>180</output>
180   The answer is 180.
<result>B</result>
A train passes a station platform in 32 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?