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Verified answer
BUNYIInterval waktu antara bunyi pertama dan bunyi kedua adalah
∆t = 2 ∆S / v
∆t = 2 (90 - 60) / 300
∆t = 0,2 s ✔️
atau
t = 2 S / v
→ t₁ = 2 • 60 / 300 = 0,4 s
→ t₂ = 2 • 90 / 300 = 0,6 s
dan
∆t = t₂ - t₁ = 0,6 - 0,4 = 0,2 s ✔️