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.## Management Sciences

A. 20 km

**B. 40 km**

C. 30 km

D. 10 km

x = 7 km/hr ; y = 3 km/hr

Ds = 10 km/hr ; Us = 4 km/hr

Distance (d) is same. Therefore, if time taken for downstream is t hours, the time for upstream is (t + 6) hours.

10*t = 4*(t + 6)

6t = 24 ; t = 4 hours

d = 10*4 = 40 km

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