two trains , one from howrah to patna and the other from patna to howrah , start simultaneously . after they meet , the trains reach their destinations after 4 hours and 10 hours respectively . the ratio of their speeds is
let us name the trains as a and b . then , ( a ' s speed ) : ( b ' s speed ) = b : a = 10 : 4 = 5 : 2 . answer : e
divide(sqrt(10), sqrt(4))