Solution
Given,
a% of 240 is c
$$=$$> $$\frac{a}{100}\times240=c$$
$$=$$> $$c=\frac{240a}{100}$$ .............(1)
c% of a is 117.6
$$=$$> $$\frac{c}{100}\times a=117.6$$
$$=$$> $$c=\frac{11760}{a}$$
$$=$$> $$\frac{240a}{100}=\frac{11760}{a}$$ [From (1)]
$$=$$> $$a^2=4900$$
$$=$$> $$a=70$$
$$\therefore\ a+c=a+\frac{240a}{100}=70+\frac{240\times70}{100}=70+168=238$$
Hence, the correct answer is Option D
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