When a person is moving in the direction perpendicular to the direction of the current is 20km/hr , speed of the current is 5km/hr. Then find the speed of the person against the current?
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You should take it as negative.
Speed of the person = 20 – 5 = 15km/hr
Speed of the person against the current = 15 – 5 = 10km/hr.
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