Question

The price of 1kg of potato is Rs. 60. 1 kg onions costs 10% less than 1 kg potato. If I pay Rs. 180 for potatoes, what will be the cost of onions (of the weight same as the weight of the potatoes)?

• A. 160
• B. 162
• C. 172
• D. 170

Answer 1

The correct option is B

162

From the given question,
The price of 1 kg of onion is Rs. 60x0.9 = Rs. 54
Now, the price of onions is directly proportional to the weight of onions.
The weight of onions and potatoes are equal.
The price of potatoes is proportional to the weight of potatoes.
Hence,$\frac{60}{180}=\frac{1}{w}=\frac{54}{x}$
Here, w represents the weight of the potatoes or onions, and x represents the equivalent price of onions.
x is the quantity we need to find out.
Therefore, by solving we get x as Rs. 162.