# Math Help - Can't solve simple conversion? help!

1. ## Can't solve simple conversion? help!

how do you convert 2 centimetres per second into kilometres per day?

according to the answer key..the answer is 1.728

2. Originally Posted by wickedcharchar
how do you convert 2 centimetres per second into kilometres per day?

according to the answer key..the answer is 1.728
know your conversion factors

1 km = 1000 m = 100,000 cm

and 1 day = 24 hrs = 1440 mins = 86,400 sec

thus, $\frac {2~cm}{1~sec} \times \frac {1~km}{100,000~cm} \times \frac {86,400~sec}{1~day} = \frac {1.728~km}{1~day} = 1.728 \mbox{ km/day}$

do you need help setting up the above expression?