 <translate> Speed of the train in metres/sec = 72000/3600 = 20
Distance travelled by train to cross the platform = 30 * 20 = 600 = Length of train + Length of platform
Distance travelled by train to cross the man = 15 * 20 = 300 = Length of train
Length of platform = 600 - 300 = 300
Thus, the answer is (C). <yor> Iyara ọkọ̀ ojú irin ní mita/ìkejì = 72000/3600 = 20 Ìjìnlẹ̀ tí ọkọ̀ ojú irin rin láti kọjá orí òpó = 30 * 20 = 600 = Gígùn ọkọ̀ ojú irin + Gígùn orí òpó Ìlàjì tí ọkọ̀ ojú irin rin láti kọjá ọkùnrin náà = 15 * 20 = 300 = Gígùn ọkọ̀ ojú irin Gígùn pẹpẹ = 600 - 300 = 300 Nítorí náà, ìdáhùn náà ni (C). 