Question

River c is 500 miles longer than River D. If the sum of their lengths is 5,520 what is the length of each River. (C and d)

Answer 1

Let's call the length of River C "c" and the length of River D "d". We know that:

c = d + 500

And the sum of their lengths is 5,520:

c + d = 5,520

We can substitute the first equation into the second equation:

c + d = c + d + 500

So:

500 = 5,520 - c - d

Rearranging, we can find the value of d:

d = 5,520 - c - 500

d = 5,020 - c

We can now use either equation to find the value of c:

c = 5,520 - d
c = 5,520 - (5,020 - c)

Solving for c, we get:

c = 2,500

And using either equation, we can find the value of d:

d = 5,520 - c = 5,520 - 2,500 = 3,020

So River C is 2,500 miles long, and River D is 3,020 miles long.