Answer:
It will take Mark 120 seconds longer than Marcy to fill the pitchers
Explanation:
* lets explain how to solve the problem
- Mark can fill up a pitcher with water in the sink in 25 seconds
- Marcy can fill the same pitcher from the outside hose in 17 seconds
- Mark will fill 15 pitchers
- Marcy will fill the same 15 pitchers
* Lets calculate the time of each one to fill them
∵ Mark can fill up a pitcher with water in 25 seconds
∵ The number of pitcher is 15
∴ The time to fill them = 15 × 25 = 375 seconds
∵ Marcy can fill the same pitcher in 17 seconds
∵ The number of pitcher is 15
∴ The time to fill them = 15 × 17 = 255 seconds
* Lets find how much longer Mark will take to fill the pitchers more
than Marcy will take
∵ Mark will fill them in 375 seconds
∵ Marcy will fill them in 255 seconds
∴ Mark will take = 375 - 255 = 120 seconds longer than Marcy
* It will take Mark 120 seconds longer than Marcy to fill the pitchers