TCS Company Numerical Ability Time Distance and Speed

A police car starts chasing a fugitive in a BMW 3 hours after the BMW escapes from the scene of crime at 10AM.The BMW drives for 10Km through the crowded roads of Shanghai and then drives into a highway,where the traffic allows vehicles to move twice as fast.After a while,the police car finally catches up with BMW after a chase that lasted 4 hours.By this time the moon was up in the sky for 4 hours.If the average speed of the police car is 83 kmph,then the average speed of the BMW is .....kmph
a)35.57
b)47.43
c)48.43
d)11.86

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TCS Other Question
Elephant competitions are of great entertainment in south india.In one such competition held in cochin,200 elephants participated.Each elephant eas given equal amount of milk to drink for a certain time period.Whichever elephant could drink the maximum would be the winner.One of the elephants named Garru could drink 1/3 of the amount of milk offered.Another elephant named Marta could drink only 1/20 of the amount of milk offered,but it was better than Thorny which could drink 2/45 of the amount of milk offered.Amazingly Darru could drink 6 litres more than 1/4 of the amount of milk offered,where as Malar could drink 2/15 of the amount of milk offered.If the amount of milk left over by the elephants GARRU and Darru were same,then calculate the total amount of milk offered to each elephant.
a)73.00 litres
b)71.00 litres
c)12.00 litres
d)72.00 litres
 In a mixture, R is 2 parts, S is 1 part. In aoder to make S to 25% of the mixture, howmuch R is to be added?