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childrens homework
I know that there is an easy way to work out formula for solving these type of maths questions but I'm beat if I can remember what it is. It's 27 years since I was at school.
A haulage company charges �240 to transport four pallets a distance of 300miles. How far would they transport five pallets for a cost of �180/
Seven men can pack 2352 boxes of chocolate bars in a 4 hour shift. How long would it take five men to pack 3150 boxes of chocolate bars?
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Answers
No best answer has yet been selected by cascath. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.The first answer is 180 miles. Teachers generally want to know how you got to the answer, so details below...
�240 divided by 300miles = �0.80 per mile for all pallets
�0.80 divided by 4 pallets = �0.20 per pallet per mile
�180 divided by 5 pallets = �36 per pallet for full journey
�36 divided by �0.20 cost per pallet per mile = 180miles
I'm not sure if this is what you'd call an easy formula, but...
1st question:
Divide �240 by 4 to get the price per pallet for 300 miles = �60; divide 300 (miles) by 60 (pounds) and you can say 5 miles costs �1 per pallet.
In the second part of the question you need to divide �180 by five (pallets). This gives you �36. So each pallet is travelling �36 worth of miles. 50 miles costs �10; 5 miles costs �1. Your pallets can therefore travel 3 x 50 miles = �30 + 6 x 5 miles = �6 or a grand total of 180 miles.
Second question is similar: 2352 divided by 7 = 336. 336 divided by four = 84. Therefore one man can pack 84 boxes in an hour. 5 men can pack 84 x 5 = 420 boxes in an hour. 3150 divided by 420 = 7.5 as GarryD39b so rightly says.
sorry here is the last question and I have worked it out myself. Could you let me know if this is correct.
In 1 Hour, 8 teachers can mark 90 exam papers. How many exam papers can 15 teachers mark in 1 and a half hrs?
90 divide by 8 = 11.25 = 1 teacher per hr
15 x 11.25 = 168.75 = 15 teachers in 1 hr
168.75 divide by 2 = 84.37 = 15 teachers in half an hr
168.75 = 84.37 = 253.12
Have I lost the plot or is this correct. Sorry I'm not really thick usually.