suppose you wanted to confirm Salviati's experiment measuring the speed of sound: speed of sound is 343m/s

1. If you wanted a 2.00 s delay from sound production to reception and knowing Salviati's value for the speed of sound already, at what distance in meters would you need to place your telescope and sound-receiving pendulum from the sound-producing pendulum?
2. Note that the pendulums strike their sounding targets in 1/4 of their period. If the first (sound-producing) pendulum has a period of 0.50 s, what periodin secondswould the second (sound-receiving) pendulum need to have in order strike at the same time as the first pendulum sound arrives at the distance calculated in the previous question?
3. What would thelength of each pendulum bein meters in order to run this experiment?