two trains 120 meters and 165 meters in length respectively are running in opposite directions , one at the rate of 80 km and the other at the rate of 65 kmph . in what time will they be completely clear of each other from the moment they meet ?
"t = ( 120 + 165 ) / ( 80 + 65 ) * 18 / 5 t = 7.07 answer : c"
divide(add(120, 165), multiply(add(80, 65), const_0_2778))