You visited us 1 times! Enjoying our articles? Unlock Full Access!

Length

A person goes...

Question

A person goes from point A to point B in 20 seconds and then returns back to point A in 18 seconds. The distance between A and B is 38 m. What is the average speed of the person?

1.75 m/s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.5 m/s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1 m/s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

2 m/s

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D 2 m/s
The average speed of an object can be defined as the total distance travelled by it in a particular interval of time. It can be calculated by dividing the total distance travelled by the total time taken.

Mathematically,
$A v e r a g e s p e e d$ = $\frac{T o t a l d i s t a n c e t r a v e l l e d}{T o t a l t i m e t a k e n}$

$A v e r a g e s p e e d$ = $\frac{38 + 38}{20 + 18}$ = $2 m / s$

Therefore, option D is correct.

Suggest Corrections

Similar questions

The distance between two points A and B is 100 m. A person moves from A to B with a speed of $20 m s^{- 1}$ and comes back from B to A with a speed of $25 m s^{- 1}$ .
Calculate the average speed and the average velocity of the person. [2 MARKS]

Q. A horse runs on a circular track of length

720

metres in

20

seconds and returns to the starting point. Calculate the average speed

A car travels on a straight road from point

A

to point

B

in four hours, and then from point

B

back to point

A

in six hours. The distance between the two points is

240 k m

.
What is the car's average speed?

Q. A person goes from point

P

to point

Q

covering

1 / 3

of the distance with speed

10 k m / h r

, the next

1 / 3

of the distance at

20 k m / h r

and the last

1 / 3

of the distance at

60 k m / h r

. The average speed of the person is

Q. In one second a particle goes from a point A to another point B moving in a semi circle of radius one metre as shown in the figure. The average speed is

Join BYJU'S Learning Program