21:["$","div",null,{"className":"px-6 pb-6","children":[false,["$","div",null,{"className":"text-foreground leading-relaxed mb-6","children":["$","div",null,{"className":"question-html prose dark:prose-invert max-w-none","dangerouslySetInnerHTML":{"__html":"

A tunnel amplifies tones at 170 and 175 Hz ( $v = 340$ m/s). Find its\nshortest length. (answer in $m$ ).

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Physics - Wave on String Question with Solution | TestHub

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