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geetanjali

· started a discussion

· 1 Months ago

error (Question: 109886.0 )

why we have reciprocate the 5/4 into 4/5

Question:
If the price of coal is increased by 25%, by what percent the consumption of coal must be reduced so that expenditure is not increased?
Options:
A) 20%
B) 25%
C) 33\(\cfrac{1}{3}\)%
D) 50%
Solution:
Ans:(a) 
New price = \(1+\cfrac{1}{4}=\cfrac{5}{4}\) of original price

\(\therefore\) New quantity with the same amount = \(\cfrac{4}{5}\) of the original quantity

\(\therefore\) Decrease in quantity = \(1-\cfrac{4}{5}=\cfrac{1}{5}=20\%\)

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Because expenditure is constant .
Keep learning,
Team TR

Naval kishor prajapat

· commented

· 1 Months ago

dusra method kya h

Suyash

· commented

· 1 Months ago

Yet to be approved!

kamal singh

· commented

· 1 Months ago

Yet to be approved!

pooja

· commented

· 1 Months ago

Yet to be approved!
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