Question

A wheel makes $360$ revolutions in $1\min$. It turns in 1 s by

• A. $6\pi$ radian
• B. $12\pi$ radian
• C. $18\pi$ radian
• D. $24\pi$ radian

Answer 1

Answer: (B)

In one minute, wheel turns by $(360\times 2\pi )$ radian
$(\because 1$ revolution $=2\pi$ radian $)$
$\therefore$ In $1s$, wheel turns by $\left(\frac{360\times 2\pi }{60}\right)$ radian.
or, In $1s$, wheel turns by $12\pi$ radian.