Three resonant frequencies of a string fixed at both ends are ,

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Three resonant frequencies of a string fixed at both ends are

90\,\text{Hz}

150\,\text{Hz}

, and

210\,\text{Hz}

. If the length of the string is

80\,\text{cm}

, what is the speed of the transverse wave in the string? (1)

45\,\text{m/s}

(2)

75\,\text{m/s}

(3)

48\,\text{m/s}

(4)

80\,\text{m/s}