75th& 76th qs.

75.
A train travels at a particular speed for a duration of one hour, after which one

of its engine malfunctions reducing its speed to 3/5th of the actual speed before the

occurance of fault in engine. It travels at this speed for 2 hours to reach at its

destination. If the fault had occured 50 miles later on, the train would have reached

its destination 45 minuts early. Find the distance traveled by the train.
76.
A bag contains 20 yellow balls, 10 green balls, 5 white balls, 8 black balls,

and 1 red ball. How many minimum balls one should pick out so that to make sure

the he gets atleast 2 balls of same colour.