Question

nancy can write 5 letters in 2 hours. Kat can write 10 letters in one and a half hours. How long will it take them to write 8 letters if they work together?

Answer 1

Round the answer to the nearest minute!

Answer 2

Nancy can write 5/2 letters in 1 hour.
Kat can write 10/1.5 letters in 1 hour.
Let the time to write 8 letters together = t hours.
\[2.5t+\frac{10}{1.5}t=8\]
Now you just need to solve this equation to find the value of t.

Answer 3

thanks!

Answer 4

You're welcome :)