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A reduction of 25% in the price of oil enables a house wife to obtain 5kgs more for Rs.800, what is the reduced price for kg?

Correct answer: C. Rs.40

  • A. Rs.20
  • B. Rs.30
  • C. Rs.40
  • D. Rs.25

Explanation

Let the reduced price be Rs.p per kg, so the original price was Rs.p/0.75 = Rs.4p/3 per kg. The extra quantity from Rs.800 is Rs.800/p - Rs.800/(4p/3) = Rs.200/p = 5 kg, giving p = Rs.40 per kg. Students often choose Rs.30 by applying the 25% reduction directly to Rs.800 instead of to the price per kg.

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Profit and loss compare the cost price and selling price of an item, using profit or loss percentages based on the cost price unless stated otherwise. Questions include marked price, discount, successive discounts, commission, and finding an unknown price, with care needed to distinguish discount from loss.

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