AMU Engineering 2018 solved paper Solved Paper

Given, air pressure, p0=10135pa and pressure at the centre of rarefaction, p1=91000Pa
As we know that, during the propagation of sound wave in air pressure varies as Thus, we have
p1=p0−dp
91000=101325−dp(putting values)
∴dp=101325−91000
=10325Pa
Thus, the pressure at the centre of compression.
p1=p0+dp
=101325+10325
=111650Pa
Therefore, the most appropriate option is (c).