Question: P and Q do a work in 21 days. Q and R do that work in 35 days, whereas R and P complete the

P and Q do a work in 21 days. Q and R

P and Q do a work in 21 days. Q and R do that work in 35 days, whereas R and P complete the same work in 28 days. In how many days P alone can complete the work? 1. 840/23 2. 840/21 3. 830/19 4. 810/18 5. None of these

Step by Step Solution

★★★★★

3.34 Rating (151 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Solution 1 P and Q do a work in 21 days Part of work d... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

How many significant figures do these numbers have? a. 23 b. 23.0 c. 0.00023 d. 0.0002302

Can Electric Forces Alone Give Stable Equilibrium? In Chapter 21, several examples were given of calculating the force exerted on a point charge by other point charges in its surroundings. (a)...

The axis of the three-hinge arch ABC is a parabola with vertex at B. Knowing that P = 21 kips and Q = 14 kips, determine (a) The components of the reaction at A, (b) The components of the force...

Following are the American College Test (ACT) scores attained by the 25 members of a local high school graduating class: a. Draw a dotplot of the ACT scores. b. Using the concept of depth, describe...

Figure 2.21 gives stem-and-leaf displays of the payment times in Table 2.4 and of the bottle design ratings in Table 1.5. Describe the shapes of the two displays. a. Use the stem-and-leaf display to...

The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1 and 2. On September 1, Irene opened a retail store that specializes in sports car...

Data Set 2 in Appendix B includes measured human body temperatures. Use the temperatures listed for 12 AM on day 2 to test the common belief that the mean body temperature is 98.6?F. Does that common...

Data Set 2 in Appendix B includes 106 body temperatures for which x= 98.20?F and s = 0.62?F. a. What is the best point estimate of the mean body temperature of all healthy humans? b. Using the sample...

[EX02-106] Following are the American College Test (ACT) scores attained by the 25 members of a local high school graduating class: 21 24 23 17 31 19 19 20 19 25 17 23 16 21 20 28 25 25 21 14 19 17...

36. Monitoring Air Pollution. The U.S. Environmental Protection Agency (EPA) monitors levels of pollutants in the air for cities across the country. Ozone pollution levels are measured using a...

Recently, Fleet Street conducted a further analysis of the trousers line of product, using ABC. In the study, eight activities were identified, and direct labor was assigned to the activities. The...

A U.S. company has committed to pay 10 million kronor to a Swedish company in one year. What is the cost (in present value) of covering this liability by buying kronor forward? The Swedish interest...

Cally is currently single and in college, but next year, she will graduate and probably get a rather high - paying job. This year she is in the 1 0 % bracket. She has stock with a basis of $ 1 , 0 0...

If a net horizontal force of 132 N is applied to a person with mass 60 kg who is resting on the edge of a swimming pool, what horizontal acceleration is produced?

A4.50-kg toy cart undergoes an acceleration in a straight line (the x-axis). The graph in Fig. 4.33 shows this acceleration as a function of time. (a) Find the maximum net force on this cart. When...

Crossing the River I A river flows due south with a speed of 2.0 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.2 m/s due east. The river is 800 m wide. (a)...

Crossing the River II (a) In which direction should the motorboat in Exercise 3.41 head in order to reach a point on the opposite bank directly east from the starting point? (The boat's speed...

On your first day at work for an appliance manufacturer, you are told to figure out what to do to the period of rotation during a washer spin cycle to triple the centripetal acceleration. You impress...

Whats meaning of double arrow and single arrow on parallel lines

Getting back an explorer in the dense jungles of equatorial Africa leaves his hut. He takes 40 steps northeast, then 80 steps 60 north of west, then 50 steps due south. Assume his steps all have...

Figure 1.7 shows the result of unacceptable error in the stopping position of a train. (a) If a train travels 890 km from Berlin to Paris and then overshoots the end of the track by 10 m, what is the...

A cube has sides of length L. It is placed with one comer at the origin as shown in Fig. 22.32. The electric field is uniform and given by E = -Bi + Cj - Dk, where B, C, and D are positive constants....

Classify the following social policies based on the approach taken to alleviating poverty: economic development, safety nets, or redistribution. a. The government of Zimbabwe reorganizes property...

Determine whether each of the following shifts is likely to increase or decrease the prevalence of rent-seeking. a. The spread of smartphones enables more widespread access to information. b. Judges...

Compare a national presidential election that receives round-the-clock media coverage with an obscure local race for a state house seat. Which imposes higher costs on people seeking to become...