two trains 111 meters and 165 meters in length respectively are running in opposite directions , one at the rate of 60 km and the other at the rate of 90 kmph . in what time will they be completely clear of each other from the moment they meet ?
"t = ( 111 + 165 ) / ( 60 + 90 ) * 18 / 5 t = 6.62 answer : e"
divide(add(111, 165), multiply(add(60, 90), const_0_2778))