Solution
Gautam travels 160 kms at 32 kmph
=> Time taken = $$\frac{160}{32}=5$$ hours
Similarly, time taken for the return journey = $$\frac{160}{40}=4$$ hours
Average speed = total distance / total time
= $$\frac{160+160}{5+4}=\frac{320}{9}$$
= 35.55 kmph
=> Ans - (D)
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