Wavelength of a wave in a certain medium is 20 cm and its velocity is 350 m/s . The same wave is transmitted into a medium where the velocity is 1400 m/s . Its wavelength in the medium would be ?

Question

$(a)\;20\;cms\qquad(b)\;60\;cms\qquad(c)\;50\;cms\qquad(d)\;80\;cms$