1.

A person can swim with 7 Km/hr in direction of flow and 3 Km/hr in opposite to the direction of flow. What is speed of person in still water?1. 4 Km/hr2. 5 Km/hr3. 6 Km/hr4. 4.5 Km/hr5. 5.5 Km/hr

Answer» Correct Answer - Option 2 : 5 Km/hr

Calculation:

Let the speed of person in still water be x and speed of current be y

According to question,

x – y = 3           …..1

x + y = 7           …..2

Adding equation 1 and 2

2x = 10

X = 5 km/hr

⇒ Speed of person in still water = 5 km/hr



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