一条隧道长760米，现有一列长240米的火车以每秒25米的速度经过这条隧道，要用多少时间？9e9U,S,o,{2N'y2t:c4M:[3r)w(x
算式：提示;K6Z'Z:w)e)n(V6k4m(A3Y/]3M-})d*\9e9U,S,o,{2N'y2t:c4M:[3r)w(x
答：要用;[6T)V,S;A/z2T;r:M*e/W8z*\*j9_/_9~;a秒。9e9U,S,o,{2N'y2t:c4M:[3r)w(x