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8 children and 12 men complete a certain piece of work in 9 days Each child takes twice the time taken by a man to finish the work In how many days will 12 men finish the same work?
13.5 days Rate of work for men = m Rate of work for children = c Therefore if we combine the rates: m + c = 1/9 Since rate = work-done/time Now m = 2c since rate of men is twice the rate of children Similarly, c = m/2 (rearranging the above) Equation becomes: m + m/2 = 1/9 3m/2 = 1/9 3m = 2/9 m = 2/27 This is the rate at which men work. For the men to complete the work, it will take x days. Rate = work/time Rate = work/x Work is 1 Rate is 2/27 2/27 = 1/x x = 27/2 x = 13.5
A train is traveling at 60 mph if the rate of speed increases 4 mph each hour how long will it be before the ship is traveling at a rate of 80 mph?
A train is traveling at 60 mph. If the rate of speed increases 4 mph each hour, how long will it be before the ship is traveling at a rate of 80 mph?
How long does it take to drive 121 miles?
Depends on average rate of speed...
How long does it takes 30857 drops to drip from 1 gallon of fluid?
The answer will depend on the drip rate. The drip rate will depend on the viscocity of the fluid which is not known.The answer will depend on the drip rate. The drip rate will depend on the viscocity of the fluid which is not known.The answer will depend on the drip rate. The drip rate will depend on the viscocity of the fluid which is not known.The answer will depend on the drip rate. The drip rate will depend on the viscocity of the fluid which is not known.
A train one mile long travels at a rate of one mile per minute through a tunnel that is one mile long?
2 hours
What is the rate of chemical reaction is?
The rate of chemical reactions is how long a chemical reaction takes to finish.
How long will it take humans to deplete the ozone layer at your current rate?
It will not finish now. However if we curb the use of CFC's, it can be replenished.
Does rate have a long or short vowel sound?
The word "rate" has a long vowel sound. The 'a' in "rate" makes the long 'ā' sound.
If one machine can complete a truckload in 2 hours and the second machine can complete a truckload in 4 hours how long would it take to complete a truckload if both machines worked on it together?
Machine # 1 works at a rate of 1/2 truckload per hour, while machine 2 works at a rate of 1/4 truckload per hour. The two machines together work at a rate of 3/4 truckload per hour complete the job 1/(3/4) = 1-1/3 hours.
Two people are painting a fence one takes 3 hours to complete the job and one takes 6 hours to complete the same job how long would it take for both to complete the same job -?
Well, darling, if one person takes 3 hours and the other takes 6 hours to paint the fence, then when they join forces it will take them 2 hours to finish the job together. It's simple math, honey. Just add their individual rates of work to get the combined rate and then divide the total job by that rate. Easy peasy lemon squeezy!
8 children and 12 men complete a certain piece of work in 9 days Each child takes twice the time taken by a man to finish the work In how many days will 12 men finish the same work?
13.5 days Rate of work for men = m Rate of work for children = c Therefore if we combine the rates: m + c = 1/9 Since rate = work-done/time Now m = 2c since rate of men is twice the rate of children Similarly, c = m/2 (rearranging the above) Equation becomes: m + m/2 = 1/9 3m/2 = 1/9 3m = 2/9 m = 2/27 This is the rate at which men work. For the men to complete the work, it will take x days. Rate = work/time Rate = work/x Work is 1 Rate is 2/27 2/27 = 1/x x = 27/2 x = 13.5
Should you complete 20-45 minutes of cardio at maximum heart rate for weight loss?
Should you complete 20-45 minutes of cardio at maximum heart rate for weight loss?
Should you complete 20 45 minutes of cardio at maximum heart rate for weight loss?
Should you complete 20-45 minutes of cardio at maximum heart rate for weight loss?
What is a constant rate?
a non-stop rate * * * * * No it is not. A non-stop rate can be faster and slower and faster and faster still etc. That is NOT a constant rate, A constant rate means the same amount for any unit of time in the whole time interval. The rate must not change at all from start to finish.
In the long run the real interest rate is determined by?
In the long run the real interest rate is determined by?
The rate for long distance phone calls is outrageous.?
The rate for long distance phone calls is outrageous.
When Does A Girls Puberty Be Complete?
every girl has a different rate about puberty
