Question

Which of the following relations is correct?
(i) Speed = Distance × Time
(ii) Speed = Distance / Time
(iii) Speed = Time / Distance
(iv) Speed = 1/ Distancex Time
NCERT Solutions for Class 7th Science Chapter 13 Motion and Time Page 156 Exercise Question 8

Answer 1

The correct relation is Speed=Distance/time.

So, option (ii) is correct.

We can also check this with the help of units.

The SI units of speed,distance and time are m/sec,m and sec respectively.

Clearly, option (ii) is satisfying the units on both sides. So, it is the correct one.

Answer 2

speed= distance/ time is correct (ii)