Math Problem Sum again

To all,
Posted through email from a reader
Please feel free to put up your working and answer
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David and Michael drove from town A to town B at different speeds. Both did not change their speeds throughout their journeys. David started his journey 30 mins earlier thatn micheal. however, micheal reached town B 5o mins earlier than david. when micheal reached town B, david had travelled 4/5 of the journey and was 75 km away from town B.

what was the distance between town a and b?
hown many kilometers did david travel in 1 hour?
what was the time taken by micheal to travel from town a to b?

sry to disturb u again but i really need help cause i dont have tuition at home.
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Another Math Problem Sum

I received another request through email from a reader. Anyone willing to help her out?

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Alice, Barbie,Cora and Daylia are given some stickers. The number of stickers Alice has is 25% of the number of stickers the other 3 children have. The number of stickers Barbie has is a third of the number of stickers the other children have, while Cora has half of the number of stickers the other children have. If Daylia has 78 stickers, how many stickers does each of the other children have?

Thank You for taking your time to read this. I appreciate it if you could give me a solution to this problem as soon as possible.

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