Answer:
The heavier body will reach the ground first as is
explained below.
Let F be the air resistance on each body. Then acceleration of the
body of mass M is
\[{{\text{a}}_{\text{1}}}=\frac{Mg-F}{M}=g-\frac{F}{M}\]The
acceleration of the body of mass m is
\[\frac{mg-F}{m}=g-\frac{F}{m}\]
As, \[\text{M}>\text{m}\], so \[{{\text{a}}_{\text{1}}}>{{\text{a}}_{\text{2}}}\]. Therefore,
the body of mass M (i.e. heavier body) will reach ground first.
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