Ans: (a) $60$ (b) No
-
$\begin{array}{rcl}
x & = & 72\div(1+20\%) \\
& = & 60
\end{array}$ - The angle at centre of District $C$
$\begin{array}{cl}
= & 360^\circ-60^\circ-72^\circ-120^\circ-30^\circ \\
= & 78^\circ
\end{array}$Since the angle at centre of District $A$ is not greater than that of District $C$, i.e. $72^\circ<78^\circ$, then the number of traffic accidents occurred in District $A$ is not greater than that in District $C$.
