A vegetable vendor sold 1 kg of potatoes for ₹25 and earned 25% profit. In the evening, he started selling potatoes with only 10% profit. At what cost (in ₹) per kg did he sell the potatoes in the evening ?

21 20 24 22

22

CP of one kg potatoes = 25 × \(\frac{100}{125}\) = 20 SP of one kg of potatoes = 20 × \(\frac{110}{100}\) = 22