SSC CGL Tier II 21 Sep 2014 Paper

Question : 86 of 100

Marks: +1, -0

A reduction of 21% in the price of an item enables a person to buy 3 kg more for ₹ 100. The reduced price of item per kg is

Solution:

(4) Original price of article = Rs. x per kg.
New price = Rs.

{79x}/100

per kg

∴{100}/{ {79 x}/{100}}- {100}/{x}=3

⇒{10000}/{79 x}- {100}/{x}=3

⇒{10000-7900}/{79 x}=3

⇒{2100}/{79 x}=3

⇒{700}/{79 x}=1

⇒ 79 x=700 ⇒ x= {700}/{79}

∴ New price

= {79 x}/{100}= {79}/{100} ×{700}/{79}

= Rs. 7 per kg

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