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A man goes by motor boat a certain distance upstream at 15 km/hr and return the same downstream at 20 kin/hr. The total time taken for the journey was 7 hrs. Find how far did he go.
A) 60 km
B) 50 km
C) 40 km
D) 120 km
Correct answer:
A) 60 km
Description for Correct answer:
\( \Large \frac{d}{20}+\frac{d}{15}=7 \)
Therefore, d = 60 km
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