Question

A woman walks to work 2 km away from her house and it takes her half an
hour, what is her speed in km/h?

Answer 1

Answer:

4 km/hr

Step-by-step explanation:

speed=distance/time

speed=2/(1/2)

speed=4 km/hr

Answer 2

Answer:

The walking speed of the woman is 4 km/h.

Step-by-step explanation:

• Speed: Distance covered per unit time is called speed. Speed expresses that how fast or how slow an object can move.
• The formula for speed is: speed = $\frac{Distance}{Time}$
• The SI unit of speed is m/s. Another unit of speed is km/hr. The relation between these two units is: 18 km/hr = 5 m/s.
• Calculation: Distance covered = 2 km.

        Time taken = half an hour = $\frac{1}{2}$ hour

        Speed = $\frac{2}{\frac{1}{2}}$ = 4 km/hr

        The speed in m/s is = 4 $\times \frac{18}{5}$ m/s = 14.4 m/s

       Here the speed is required in km/h unit.

       ∴ The walking speed of the woman is 4 km/h.

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