AIPMT | 2015Basic Maths and Units and DimensionsHard
Question
A ship A is moving Westwards with a speed of 10 km h-1 and a ship B 100 km South of A, is moving Northwards with a speed of 10 km h-1. The time after which the distance between them becomes shortest, is :-
Options
A.5h
B.5√2 h
C.10√2 h
D.0 h
Solution
= 10√2 kmphdistance OB = 100 cos45o = 50√5 km
Time taken to reach the shortest distance between
A & B =
tsn = 5 hrs.
Hence option (1)
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