Physical World
Quick practice
Question 1 of 5
A boy walks towards the east for 5 km in 30 min, then takes rest for 10 min and walks towards the north for 4km in 20 min. What is his average speed?
A
7.5 kmph
B
9 kmph
C
10.8 kmph
D
6.4 kmph
Get unlimited practice with CBSE Class 11 subscription
Boost your performance with adaptive practice tests
Practice every concept in the syllabus
Compare your speed and accuracy with your peers
Download the app and practice on the go