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Quantitative Aptitude :: Average - Discussion

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Choose the correct option.

A reduction of 21% in the price of wheat enables a person to buy 10.5 kg more for Rs. 100. What is the reduced price per kg ?

ARs. 2

BRs. 2.25

CRs. 2.30

DRs. 2.50

Answer: Option (Login/Signup)

Show Explanation

Answer: Rs 2 per kg



Solutions:Let original rate = Rs. X per kg

New rate = 79% of Rs. X per kg

= Rs. (79 * X)/100) per kg

Now,

{(100/79X)/100} - {100/X} = 10.5

Or, 10000/79X - 100/X = 10.5

Or, 10000 - 7900 = 10.5 * 79X

So, X = 2100/(10.5 * 79)

Thus, X = 2100/(10.5 * 79) 

Reduced rate = Rs. (79/100) * 2100/(10.5 * 79) per kg = Rs. 2 per kg.

Asked In :: Wipro

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