Train A traveling at 60 km/hr leaves Mumbai for Delhi at 6 P.M. Train B traveling at 90 km/hr also
leaves Mumbai for Delhi at 9 P.M. Train C leaves Delhi for Mumbai at 9 P.M. If all three trains meet at the same time between Mumbai and Delhi, what is the speed of Train C if the distance between Delhi and Mumbai is 1260 kms?  Select
A) 110km/hr
B) 120km/hr
C) 130km/hr
D) 140km/hr
E) 150km/hr
let time taken by train b is t hrs to meet train A   so let the train A and 120km/hr meets at distance x   As the distance will be same so   time taken by train A is t+3   so 60*(t+3)=90*t   so t = 6hrs   now distance covered by train A is   90*6= 
<gadget id="calculator">  90*6</gadget>
<output>540</output>
540   And the remaining distance will be covered by train c to meet= 1260-540= 
<gadget id="calculator">1260-540</gadget>
<output>720</output>
720   so speed of train c is   720/6= 
<gadget id="calculator">  720/6</gadget>
<output>120</output>
120km/hr   ANSWER:120km/hr
<result>B</result>
Train A traveling at 60 km/hr leaves Mumbai for Delhi at 6 P.M. Train B traveling at 90 km/hr also
leaves Mumbai for Delhi at 9 P.M. Train C leaves Delhi for Mumbai at 9 P.M. If all three trains meet at the same time between Mumbai and Delhi, what is the speed of Train C if the distance between Delhi and Mumbai is 1260 kms?