Question

The depth of a lake in cedar burg changes over time due to rain fall and evaporation this year it was 39 feet which is 25% less deep than it was last year what was last years depht

Answer 1

The depth of the lake last year was 52 feet

Explanation:

Given as :

This year depth of lake = 39 feet

Let the last year depth of lake = x feet

Now,

According to question :

The depth this year is 25% less than that of last year

I.e 39 feet = x - 25% of x

Or, 39 feet =
`(75x)/(100)`

or, x =
`(3900)/(75)`

∴ x = 52 feet

Hence The depth of the lake last year was 52 feet Answer