[" A train covers a distance of "10km" in "],[12" minutes.If its speed is decreased "],[" by "5km/hr" ,the time taken by it to "],[" cover the same distance will by it to "],[" Wort the same distance will be : "],[" and totils "10fol" it."],[" All "(10)/(21)s" than "17fin5fort/riel" and and "],[" (a) "10" minutes "20sec],[" (b) "13" minutes "20sec],[" (b) "13" minutes "],[" (c) "13" minutes "20" sec "],[" (d) "11" minutes "20" sec "]