A reduction of 20%in the price of tea enables a purchaser to get 4kg more for $80,Original price of 1kg tea? - after % reduction, what is original price
Word problem, the percentage reduction.
Tuesday, February 16, 2010
After % Reduction, What Is Original Price A Reduction Of 20%in The Price Of Tea Enables A Purchaser To Get 4kg More For $80,Original Price Of 1kg Tea?
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where n = number of pounds of tea in the first price P = first cost per kg
n * p = $ 80 = 80 / p
We also know that for the same $ 80 can get you 4 kg N for the price of 8 P (80%) of the original price, so that we
(n +4) * (.8 p) = 80
replace n = 80 / p for
(80 / p + 4) *. 8p = 80 and solve for p
.8 (80 +4 p) = 80
80 +4 p = 100
4P = 20
p = 5 $ per kg
check at a price of 5, you could Buy 16 kg for $ 80
the reduced price of .8 * 5 or 4, you can buy 20, which is actually 4 more than 16 years.
I think it's $ 4 .. If my calculations are correct, ie:)
Rate as x
for 80 we have 80 / x
if more than 20% will be reduced, which is 4 / 5
for 80 we have 80 / (4x / 5) = 100 / X
if it is 4 more than 100 / x = 80 / x + 4
multiply x with 100 = 80 + 4x
4x = 20
x = 5
is 5
The new price of 1 kg will cost $ 20. $ 20 + 20% amounts to $ 24 Original price is $ 24
Current rate is $ 5 per kg. to 16 kg of 80 fraud.
20% lower prices an average of $ 4 per kg, 20 kg available for $ 80.
OK?
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