Question

A person crosses 200m long street in 2 minutes.What is his speed in km per hour

Answer 1

d= 200m
t=2 minute 120 sec
s=d/t
200/120× 18/5
s=6km/hr
if m/s change to km/hr then multiply ×18/5)

Answer 2

Answer:

The speed of the person is 6km/hr.

Step-by-step explanation:

Given that,

The length of the street crossed by the person is 200m.

The time taken by him to cross the street is 2 minutes.

We shall write the given quantities in the required units as shown below-

$L=200m=\frac{200}{1000} km=0.2km$

$t=2 min=\frac{2}{60} h=\frac{1}{30}h$

We know that Speed is the ratio of distance traveled by a person to the time taken. Therefore, We write-

$v=\frac{L}{t}$

Substituting the known values in the above relation we get

$v=\frac{0.2km}{\frac{1}{30}h}=30\times0.2=6km/hr$

Therefore,

The speed of the person is 6km/hr.

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