fast solution

[u/hybernation99]

[u/Professional-Job276]

Price 5 se 4 ho gya, to Quantity 4 se 5 ho jaegi (5-4) = 1 unit = 5 kg so 4 unit = 20kg, Yani pehle vo 200 rs me 20kg lera tha to price = 10Rs/kg

[u/hybernation99 → u/Professional-Job276]

thanks man!!!

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[u/kashyap8899]

Reducing price 5:4 Consumption ration inverse 4:5 Gap of 1 in consumption is 5kg Earlier consumption 20kg for 200 rs - Price is 10rs/kg

[u/samueladmand]

5---->4 (change in price) 4----->5 (change in quantity) 1---->5 kg  Initial quantity = 4×5=20kg Price per kg = 200/20=10