# math

Nahana takes 2 hours to deliver newspapers to her 125 customers. Angela delivers the same number of newspapers in 3 hours. How long will it take them to deliver the 125 newspapers if they work together? I'm so confused.

1. 👍
2. 👎
3. 👁
1. N delivers 125/2 papers per hour
A delivers 125/3 papers per hour
together they deliver (125/2 +125/3) papers/hr
that is really 125(1/2+1/3) = 125 (3/6+2/6) = 125 (5/6) papers/hr
so
125 (5/6) papers/hr * x hours = 125 newspapers
x = 6/5 hours = 1 1/5
1/5 hour = 60/5 = 12 minutes
so
an hour and 12 minutes

1. 👍
2. 👎

## Similar Questions

1. ### Calc

The number of bacteria in a culture is increasing according to the law of exponential growth. There are 125 bacteria in the culture after 2 hours and 350 bacteria after 4 hours. a) Find the initial population. b) Write an

2. ### precalculus

please can somebody explain to me how to do this questions 8. Elli travelled 700km by truck to deliver some ostriches to her friend's farm. she then returned the same distance by car. The car averaged 10km/h faster than the truck

3. ### math

Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with parameter λ (lambda) = 0.5. What's the probability that a repair takes less than 5 hours? AND what's the

4. ### Calculus

Pumping stations deliver gasoline at the rate modeled by the function D, given by D(t)= 6t/(1+2t) with t measure in hours and and R(t) measured in gallons per hour. How much oil will the pumping stations deliver during the 3-hour

1. ### Physics

In a hydroelectric installation, a turbine delivers 1500 hp to a generator, which in turn transfers 80.0% of the mechanical energy out by electrical transmission. Under these conditions, what current does the generator deliver at

2. ### math

Power companies typically bill customers based on the number of kilowatt-hours used during a single billing period. A kilowatt is a measure of how much power (energy) a customer is using, while a kilowatt-hour is one kilowatt of

3. ### Science

On page 111 of your reading material there is a problem that requires you to calculate the average speed for a daylong bus trip. The rest stops the driver made are included in the calculations because that is how the problem is

4. ### math

A cyclist travels for 60km at x km/h and 180km at y km/h and takes 10 hours altogether for the journey. If the speed are interchange, the journey takes 8.6 (8 whole number 2 over 3) hours. Find x and y.

1. ### math

Angela, Mary and Tiff are all standing near the intersection of University and 42nd streets. Mary and Tiff do not move, but Angela runs toward Tiff at12 ft/sec along a straight line, as pictured. Assume the roads are50 feet wide

2. ### pre algebra

Angela shared a cab with her friends. When they arrived at their destination, they evenly divided the j fare among the 333 of them. Angela also paid a 5 tip. How much did Angela pay in total? Write your answer as an expression.

3. ### statical infrences

The time taken by a milk man to deliver milk to GOR estate is normally distributed with mean 12 minutes and standard deviation of 2 minutes. Estimate the number of days during a year when he takes between 9 to 13 minutes. Estimate

4. ### Statistics

According to a recent survey, 75% of all customers will return to the same grocery store. Suppose 8 customers are selected at random: A) What is the probability that exactly five of the customers will return? B) What is the