Question

the temperature dropped 15 degree celsius in the last 30 days if the rate of temperature drop remain the same how many degrees will temperature drop in the next 10 days

Answer 1

Okay, so if the temperature drops 15 degrees in the last thrity days, you would have to find the unit rate (or, in this case, how much the temperature drops in one day).  To do this, you need to divide the amount of days by the temperature dropped, so 30 divided by 15.  When you do that, you get 2.  Now that you've figured this out, you can take 15 and you can add 2 to it ten times.  So 15+2+2+2+2+2+2+2+2+2+2, which this is equal to 35. You could also just take 2 and multiply it by 10 and then add 15 to it. Either way, in ten more days, the temperature will drop 35 degrees.  

Hope this is what you were looking for.