Virtual currency GFA

1. It is known that the sound speed SV = 340m / s, so the aircraft speed v = 1.5 * 340m / S = 510m / s< According to the formula: T = H / SV, after the plane roars from the top of the head, the sound reaches the ear all the time t = 2720m / 340m / S = 8s
finally, according to the distance formula: S = VT, the plane has reached the front horizontal distance S = 510m / s * 8s = 4080m.