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Question

Two cars started moving from a point, one toward north at 30 km/hr & other toward East at 40 km/hr : distance b/w them after 2 hr is ___

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Solution

In two hour first car has travelled a distance of 2×30=60 km toward north

Second car would have travelled 2×40=80 km toward east.

distance between them can be calculated using pythagoras theorem.

AB2=OA2+OB2AB2=(80)2+(60)2=6400+3600=10000AB=100 km


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