Question

A mam
walks 100 m in 3 min.find his speed in km/hr answer will be 2 km/ hr can you explain me step by step​

Answer 1

Step-by-step explanation:

3 mins = 3*60 seconds = 180 seconds.

Now speed = D/T

=100/180

=5/9m/s

If we want to changeit into kmph, then we mutiply it with 18/5

So 18/5*5/9 = 2 kmph.

I hope you understand my answer. Stay safe.

Answer 2

Answer:

here is your answer...hope it helps....stay safe...stay home....

Step-by-step explanation:

Speed of a body is the distance covered by the body in unit time.

Therefore Speed=  which implies:

1. In order to find speed, if :

Distance is in metre (m) and time in second (s); then the speed is in metre per second (m/s)Distance is in Km (Km) and time in hour (h); then the speed is in Kilometer per hour (Km/h)

2. In order to find the distance, if:

Speed is in metre per second (m/s); time must be in second .Speed is in Kilometer per hour (Km/h);time must be in hour

3. In order to find time, if:

Speed is in Kilometer per hour (Km/h), distance must be in Kilometer.Speed is in metre per second(m/s), distance must be in metre.Unit of Speed

Now, the various units of distance are metre, centimetre, Kilometre etc. and the various units of time are hour, minutes and seconds.

So, say we take the unit of distance to be centimetre (cm.) and the unit of time to be second (s.).

Example: A snail covers a distance of 8 cm in 4 seconds.

So the speed of the snail is 

So here, 

The two most widely used units of speed are as follows: metre/sec or m/s and Kilometre/hour or Km/h.

Example: The speed of sound in air is 330 m/s.

Example: The car is travelling at a speed of 60 Km/h.