Question

Please help ASAP!!!!!

Answer 1

For this case we can do the following:

DC= 112 mi

DD= 106 mi

We also know that VC= x+3 mi/ht

Where x is the velocity of Diana

Then by definition of time we have:

t= D/V

And we can do this:

`(112)/(x+3)=(106)/(x)`

And we can solve for x on this way:

`112x=106x+318`
`6x=318`

x= 318/6 = 53 mi/hr

VC= 53 +3 = 56 mi/hr