Question

A reduction of 20 percent in the price of flour enables akriti to buy an extra 5kg of it for ₹320.find the original price per kg and the reduced price per kg

Answer 1

Answer:

Step-by-step explanation:

It is based on inverse proportion or product constancy concept. Reduction in price 20% amount of sugar will increase 25%.

It means,

25% = 6 Kg. So,

Initially, total Sugar = 6*4 = 24Kg. Thus,

Original price of the sugar was,

240/24 = Rs. 10 per kg.

Note:

Let initial price of 100 kg Sugar was Rs. 100.

Now, 20% decrease in rate then rate of 100 kg sugar would be Rs. 80.

So,

Rs. 80 = 100 kg sugar.

Rs. 1 = 100/80 kg sugar.

Rs. 100 = (100 *100)/80 = 125 Kg sugar.

Increment in sugar = 25 kg.

% increment = (25*100)/100 = 25%.

Means 20% rate decrease, 25% of consumption increase.