Rainfall - average MOVED

Mumisstruggling

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Hi there,
I'm sure there's an easy answer but I'm totally lost on how to help my son with the following problem - any assistance would be greatly appreciated:


At the end of 2009 the average rainfall in a town for the ten year period just ended was 631mm. A year later the ten year average was 601mm and 450mm had fallen in 2010. What was the rainfall, in mm, in 2000?

thanks again
 
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Hi there,
I'm sure there's an easy answer but I'm totally lost on how to help my son with the following problem - any assistance would be greatly appreciated:


At the end of 2009 the average rainfall in a town for the ten year period just ended was 631mm. A year later the ten year average was 601mm and 450mm had fallen in 2010. What was the rainfall, in mm, in 2000?

thanks again

Total rainfall during 2000 + [Total rainfall during 2001-2009] = 631 * 10

[Total rainfall during 2001-2009] + 450 = 601 * 10

Can your son continue from here....
 
Thank you!

Total rainfall during 2000 + [Total rainfall during 2001-2009] = 631 * 10

[Total rainfall during 2001-2009] + 450 = 601 * 10

Can your son continue from here....


thankyou! Once I showed him that it was like a lightbulb moment - I haven't done any problem solving since my high school days so I'm a bit rusty :)
 
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