0
Average weight of 100 screws in box 'A' is 10.4gms it is mixed withed with150 screws of box 'B' average weight of mixed screws is 10.9 gms find the average weight of screws of box 'B'?
Wiki User
∙ 13y ago
Let 'x' be the total weight of 100 screws in box 'A'
therefore,
average weight of 100 screws in box 'A' = (x / 100) = 10.4
=> x = 100*10.4 = 1040 gms ............ (1)
Let 'y' be the total weight of 150 screws in box 'B',
therefore,
average weight of 150 screws in box 'B' = (y / 150) .......... (2)
After mixing 100 screws of 'A' and 150 screws of 'B',
average weight of 250 screws = (x+y)/250 = 10.9
=> x+y = 250*10.9 = 2725
=> 1040+y = 2725
=> y = 2725 - 1040 = 1685
=> total weight of 150 screws of box 'B', y = 1685 gms
Substitute y = 1685 in eqn (2),
=> average weight of screws of box 'B' = 1685/150 = 11.23 gms (approx)
Hence,
average weight of screws of box 'B' = 11.23 gms
SHORT ANSWER
"""""""""""""""""
Given data:
No. of screws in box 'A', NA = 100
No. of screws in box 'B', NB = 150
Average weight of 100 screws in box 'A', XA = 10.4 gms
Average weight of mixed screws, XAB = 10.9 gms
Average weight of 150 screws in box 'B', XB = ?
Therefore,
XAB = (NA XA + NB XB) / (NA + NB)
10.9 = (100*10.4 + 150XB) / (100+150)
10.9 = (1040 + 150XB) / 250
10.9*250 = 1040 + 150XB
2725 = 1040 + 150XB
2725 - 1040 = 150XB
1685 = 150XB
XB = 1685/150 = 11.23 gms
XB = 11.23 gms
- Ratnakar Sharma
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What screws are used as a simple machine?
All screws are used as simple machines.
What is function of balancing screws in physical balance?
Screws help to level beam of physical balance so that both pans can be balanced before putting mass and weight in both pans. WAHEED
How do you weigh small screws?
Get a scale appropriate for the amount you wish to weigh. Get a container to put the small objects (screws) in. Weigh the container while it is empty, many modern digital scales allow you to "Zero" the scale with your container on it making for an easy short cut. Write down the weight of the container. Put your screws in the container and weigh the container and the screws. Subtract the weight of the container
How does friction affect screws?
Friction holds screws in. It also makes insertion harder. With wood screws, one should drill a hole in the wood first. Then, the fibers will twist with the screw, and oppose removal more strongly than insertion. In machine screws, the softer washer distributes the force of the screw, permitting higher frictions in the threads without damaging the joined materials.
Examples of screws around the house?
lid jar
What is the average insurance payout for broken leg and ankle that now has screws and plates in the UK?
fracture of left midshaft of the tibia
What is the average insurance settlement for broken bone injury in Georgia?
What is the aveage insurance settlement for broken bone injuries that required surgery and screws placed in the bone.
What is the average cost to mount a wall pot rack?
It only takes a few screws to mount a wall pot rack. If you do it yourself instead of calling a handyman, you're going to end up saving a lot of extra cash and have the satisfaction of doing it yourself!
How long will the average drill last on one charge?
That depends on many factors,especially how much torque you need for the job.If you're driving big screws then a typical drill will be dead in about three hours of heavy use.Professional models will do that all day,but you pay for that.
How do you remove a TV turntable from a cabinet?
Turntable RepairHow to remove your turntable from your console:If there are no obvious screws attaching the turntable unit to the furniture or cabinet you may need to remove the back piece of the cabinet which is usually a thinner price of ply-board. Upon removing the ply-board their should be some screws attaching the turn table from the inside that can be disconnected using an average philips head screw driver.
Where is the PCV valve located in a 1996 Plymouth Voyager?
in the front of the engine on the right side of the engine. next to the plenum. you will see a black hose that leads into a small metal valve that screws to the engind. if you pull the hose off you can remove it with a deepwell socket. not your average looking pcv valve.
How much does it cost to paint a small plane?
The average paint of a small plane can cause upto $ 600 to $ 4000, for the exterior portion of aircraft. A basic coat of non metallic paint and the use of new stainless steel screws for the cowling and wing tanks will cost around $ 7000 to $ 9000.
What is the total number of screws in the Eiffel tower in France?
there are 2.5 million screws. not screws - rivets
Seprate steel screws from brass screws?
A magnet will pick up the iron screws but not the brass.
What are tek screws?
Tek screws are a name brand type of self drilling screws. They can also be called drill bit screws and self tapping screws. Phillips and other companies manufacture these as well.
How many screws in a ton?
The answer will depend on the size of the screws!
How many words can you make out of screws?
one which is screws
