A wheel increases its speed from 60 rpm to 120 rpm in 10 s. Number of rotation made by it in 10 s is
A wheel increases its speed from 60 rpm to 120 rpm in 10 s. Number of rotation made by it in 10 s is
A. 10
B. 15
C. 25
D. 20
7 views
1 Answers
Correct Answer - B
`N=((n_(1)+n_(2))/(2))t`
`=((60+120)xx10)/(2xx60)=(180)/(60xx2)xx10=15`.
7 views
Answered