Read the following assertion and reason based statements and choose the correct answer:
1. Assertion (A): If the speed of sound is \(340\ m/s\), sound travels \(34\ m\) during a time interval of \(0.1\ s\).
Reason (R): Therefore, the minimum distance between the source and the reflecting surface required to hear an echo is \(34\ m\).
Reason (R): Therefore, the minimum distance between the source and the reflecting surface required to hear an echo is \(34\ m\).
2. Assertion (A): A student concludes that a reflecting surface must be at least \(17\ m\) away to hear a distinct echo when the speed of sound is \(340\ m/s\).
Reason (R): The minimum distance is obtained by multiplying the speed of sound by \(0.1\ s\) without dividing the result by \(2\).
Reason (R): The minimum distance is obtained by multiplying the speed of sound by \(0.1\ s\) without dividing the result by \(2\).