Two men A and B start from a place P wal...

Two men A and B start from a place P walking at 3 kmph and 3½ kmph respectively. How many km apart will they be at the end of 2½ hours?
(i) If they walk in opposite directions ?
(ii) If they walk in the same direction ?
(c) What time will they take to be 16 km apart if
(a) they walk in opposite directions ?
(b) in the same direction ?

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