Question

The speed of a boat in still water is 15 km/h and the speed of the current is 3 km/h. How much distance (in km) can be covered going downstream in 12 minutes?

• A. 3.5
• B. 3.7
• C. 3.4
• D. 3.6

Answer 1

Answer:

D. 3.6

Downstream speed

$15 + 3 = 18 \text{ km/h}$
Convert time

$12 minutes = ( \frac{12}{60} = \frac{1}{5} ) hour$

Distance

$\text{Distance} = 18 \times \frac{1}{5} = 3.6 \text{ km}$
Final Answer:

3.6 km