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How to do this ultrasound wave question?

https://postimg.cc/PpBw8hmJ

Struggling to understand the answer to this on why its A

Ive only been able to get answers F and E via (5000x0.2ms) or (5000x0.12ms) and 0.4 via (5000x0.08). Why is the Answer A??
Reply 1
Original post by MonoAno555
https://postimg.cc/PpBw8hmJ

Struggling to understand the answer to this on why its A

Ive only been able to get answers F and E via (5000x0.2ms) or (5000x0.12ms) and 0.4 via (5000x0.08). Why is the Answer A??

Did you account for the times being for two way trips?
Reply 2
Original post by Joinedup
Did you account for the times being for two way trips?

Oh nope missed it at first, I actually figured it out, you have to divide 0.4 by 2, which gives the answer 0.2
(edited 6 months ago)

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