Q. Two trains in the same direction at 50 & 32 kmph respectively. A man in the slower train observes the 15 seconds elapse before the faster train completely passes him. What is the length of faster train?
Q. A car is journied a certain distance in 7 hrs in forward journey in the return journey increased speed 12km/hr takes the times 5 hrs. what is the distance
"Mathematics is just a game of greatest fun so every one should play it "
Jass
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?