Question

Example 9: Sumaiya generally spent Rs. 800 for buying a
month's provision of potatoes. However, lower yield this
year caused the cost of one kilogram of potatoes to be
increased by 60%. Owing to this, Sumaiya had to buy 30 kg
less potatoes than usual. What is the cost of potatoes this
year?​

Answer 1

Answer:

Rs 16/kg

Step-by-step explanation:

Solving it using ratio method

the price will be inversely proportional to the consumption i.e when the price increase consumption decrease.

so here let initial cost be 100 and it increased to 160

so ratio of price is 100:160

consumption will be in inverse ratio 160:100

on simplifying the ratio becomes 8:5

so 3 units = 30

1 unit =10

so the initial consumption was 10*8= 80 kg and now it reduced to 10*5= 50 kg

so initial price 800/80= 10/kg

cost of potatoes this year 800/50 = 16/kg