## anonymous one year ago A train travels 42 kilometers in 15 min. How far will the train travel in 3 hours at that speed. A. 168km B. 336km C. 504km D. 672km

1. anonymous

2. Black_ninja123

What do you think the answer is?

3. anonymous

The answer is C) Method 1: There are 60 minutes in an hour, so 4 x 15 minutes 3 hours = (15 x 4) x 3 = 15 x 12 So there are 12 blocks of 15 minutes in 3 hours. You can then do: 12 x 42 = 504 km The train travels 504km in 3 hours. Method 2: 42 km in 15 15 x 4 = 1 hour and 42 x 4 = 168 so, it travels 168km in an hour 168(km) x 3(hours) = 504km in 3 hours

4. Black_ninja123

60*3=180 180*42=7560 7560/15=504 @manish00333 is correct

5. mathstudent55

$$15 ~min = 0.25 ~h$$ $$\dfrac{42~ km}{15~min} = \dfrac{42~km}{0.25~h} = 168 \dfrac{km}{h}$$ $$168 \dfrac{km}{\cancel h} \times 3~\cancel h = 504~km$$

6. TheRaggedyDoctor

Don't just give out answers. @manish00333

7. anonymous

Thanks @mathstudent55 @black_ninja123@manish00333