plss ans. this geniuses
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Answer:
200(√3-1)m/sec.
Step-by-step explanation:
AB and CD is cover in 15 sec.
AC = ED = 3km
In triangleABC,
AC/BC = tan45°
AC/BC = 1
AC = BC = 3km
In triang8leBED,
DE/BD = tan30°
DE/BD = 1/√3
BD = √3DE = 3√3km.
CD = BD - BC
CD = 3√3 - 3
CD = 3(√3 - 1)km.
Distance = 3(√3 - 1)km = 3000(√3-1)m
time = 15sec.
Speed = Distance/time
= 3000(√3-1)/15
= 200(√3-1)m/sec.
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