If the wavelength of Deepika’s voice is 2 and that of Ashwaria is 5m respectively in air. Find the frequency of Ashwaria’s voice. Fi the frequency of Deepika’s voice is 750Hz. Which of them has a higher pitch?

v = f(lambda).

I'm guessing we must assume the speed of sound in air, which is about 343m/s.
So the whole problem makes no sense. If Deepika's wavelength is 2 his frequency should be 172Hz.
If we assume frequency and wavelength are correct he's in a place where the speed of sound is 1500 m/s. In this freakish place Ashwaria's frequency is 300Hz.