A train passes a platform in 44 seconds. The same train passes a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, The length of the platform is  Choose the correct option.
A) 240  B) 250  C) 360  D) 230  E) 220
Speed of the train = 54 km/hr = (54×10)/36 m/s = 15 m/s   Length of the train = speed × time taken to cross the man = 15×20 = 300 m   Let the length of the platform = L   Time taken to cross the platform = (300+L)/15   =&gt; (300+L)/15 = 36   =&gt; 300+L = 15×44 = 660   =&gt; L = 660-300= 
<gadget id="calculator">660-300</gadget>
<output>360</output>
360 meter   Answer is 360.
<result>C</result>
A train passes a platform in 44 seconds. The same train passes a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, The length of the platform is