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Deeksha Chauhan

· started a discussion

· 1 Months ago

191128.0 (Question: 191128.0 )

Please explain

Question:
If the price of rice is reduced by 20%, one can buy 2 kg more for  Rs. 100. The reduced price of rice per kg is –
Options:
A) ' 5
B) ' 10
C) ' 40 
D) ' 50
Solution:
Ans: (b)

let original price of rice = 2x/kg

after deduction of 20% in the price=Rs. 0.8x/kg

\(\cfrac{100}{0.8x}-\cfrac{100}{x}=2\)

\(\cfrac{100-80}{0.8x}=2\)

x=\(12\cfrac{1}{2}\)

0.8x=10

New price =10/kg


Second Method


Knowledge Expert

· commented

· 1 Months ago

Dear Student,
please mention your doubt, then i will explain accordingly.
Keep learning !!
Best wishes
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