A) 5 |
B) 7.5 |
C) 13 |
D) 10 |
D) 10 |
Speed of boat downstream
= \( \Large \frac{Distance \ covered}{Time \ taken} = \frac{30}{2} \) = 15 km/h
Now, speed of boat upstream
= \( \Large \frac{Distance \ covered}{Time \ taken} = \frac{30}{6} \) = 5 km/h
Now, speed of boat
= \( \Large \frac{Speed \ downstream + Speed \ upstream}{2} \)
= \( \Large \frac{15+5}{2} = \frac{20}{2} \) = 10 km/h