math
posted by Jose .
Jack and Jill wash a car at the same rate . Working together it takes them an hour and 10 minutes to wash a car. One day jack started washing a car by himself at 2:30 p m. When he was half way done , Jill joined him . What time did they finish washing the car?

It would take them 70 minutes to wash the whole car working together, working at the same rate.
Jack did half the car by himself , and that would have taken him 70 minutes working alone
so that leaves half the car to be washed by both working together.
This will obviously take them 35 minutes.
so add 70 min + 35 min to 2:30 > 4:15 pm
Respond to this Question
Similar Questions

Critical Thinking
Need help with identifying argument and reasoning for Having your car washed at the carwash may be the best way to go, but there are some possible drawbacks. The International Carwashing Association (ICA) has fought back against charges … 
math
Megan and Sam together take 12 minutes to wash a car. Washing the car by herself took Megan 21 minutes. How long would it take Sam to wash the car? 
math
A group of students have volunteered for the student council car wash. Janet can wash a car in m minutes. Rodrigs can wash a car in m5 minutes, while Nick needs the same amount of time as Janet.If they all work together, they can … 
algebra
frank can wash the car in 2/3 the time his younger brother,joe,can wash the car.they worked together and washed the car in 40 minutes.how long would it have taken each boy working separately? 
Algebra
Evan washes two types of vehicles. It takes him 30 minutes to wash a car and 40 minutes to wash a truck. He charges $12 to wash a car and $15 to wash a truck. In 270 minutes, Evan made $105 washing cars and trucks. How many trucks … 
mohale
Kwaito enrolled at university of johannesburg, his family gives him a pocket money that doesn't last for a month. So he decided to work at Ramodumo car wash next to his campus to make extra cash. A car wash agrees to pay him R55.00 … 
Math
Together Paul and Jack earned $72 washing cars. Jack washed twice as many cars as Paul. If Paul washed 3 cars, how much did they charge to wash each car? 
algebra 21
Evan washes two types of vehicles. It takes him 30 minutes to wash a car and 40 minutes to wash a truck. He charges $12 to wash a car and $15 to wash a truck. In 270 minutes, Evan made $105 washing cars and trucks. How many trucks … 
science
Suppose an ideal car jack has an input work 2750 J. It lifts a car 0.35 meters in 8 seconds. a. What is the output work of the jack? 
English
1. She had me wash the dishes. 2. I was had to wash the dishes. (X) 3. I was asked to wash the dishes.(O) 4. He bade me come in. 5. I was bidden to come in. (Is #5 correct?