CameraIcon

SearchIcon

MyQuestionIcon

151

You visited us 151 times! Enjoying our articles? Unlock Full Access!

Mean

Alex went to ...

Question

Alex went to school, riding his bicycle at 8 km/hr and came back at a speed of 12 km/hr. What is the average of his speeds?

A

20 km/hr

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

B

6 km/hr

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

C

8 km/hr

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

D

10 km/hr

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

Open in App

Solution

The correct option is D 10 km/hr
Average of Speeds = $\frac{S p e e d 1 + S p e e d 2}{2}$

= $\frac{8 + 12}{2}$
= $\frac{20}{2}$ = 10 km/hr

Suggest Corrections

thumbs-up

0

Similar questions

Q. A boy walks to his school at a distance of 6 km with constant speed of2.5

\frac{k m}{h r}

and walks back with a constant speed of 4

\frac{k m}{h r}

. His average speed for round trip expressed in

\frac{k m}{h r}

Q. A boy goes to school from his home at a speed of

x

km/hr. and comes back at a speed of

y

km/hr. then the average speed of the boy is

Q. Hariram travels at a speed of

20 k m h r^{- 1}

while going to school. While coming back, he travels at a speed of

30 k m h r^{- 1}

(due to less traffic). What is his average speed?

Q. A Man started his journey, he travelled 400 km, at the speed of 40 km/hr then he went to another 300 km, at the speed of 20 km/hr. Further he went 600 km, at the speed of 30 kmk/hr. The average speed of a Man is:

Q. A man riding on a bicycle covers a distance of

60

km in a direction of wind and comes back to his original position in

8

hours. If the speed of the wind is

10

km/hr, find the speed of the bicycle.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Central Tendency

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon