Question

A girl runs 15 km and 40 min . what is the speed in km/hour?
explain step by step​

Answer 1

Given :

That girl 15 Kms and 40 Min

Asked:

To find the speed of the girl

Solution :

Distance = 15Kms

Time = 40 Min

Speed=Distance / Time

15kms/40 Min

0.375 Km/hr

Answer 2

Answer:

Given –

• Distance travelled = 15 km.
• Time taken to travel = 40 min.

To Find –

• Speed in km/hr.

Solution –

There are 60 minutes in an hour.

Hence, 40 minutes = 2/3 hour.

We know, Speed = Distance/Time.

Hence, Speed = 15 km/(2/3) hour

➸ Speed = 15 * 3/2

➸ Speed = 45/2

➸ Speed = 22.5 km/hr.

IMPORTANT TERMS :–

• Displacement is the shortest distance between the initial position and the final position of the body.
• Displacement is said to be a vector quantity as it has a direction.
• Distance is the total length of the path travelled by the body.
• Distance is a scalar quantity.
• Velocity is the rate of change of displacement.
• Velocity is a vector quantity.
• Speed is rate of change of distance.
• It is a scalar quantity.