5 kg of ₹18 per kg wheat is mixed with 2 kg of another type of wheat to get a mixture costing ₹20 per kg. Find the price (per kg) of the costlier wheat.

₹25

The amount of wheat is 5 Kg and price is Rs.18/Kg

The amount of wheat is 2 Kg

The amount of wheat is 7 Kg and price is Rs. 20/Kg

⇒ 5 x 18 + 2 x y = 7 x 20,

⇒ 90 + 2y = 140,

⇒ 2y = 50,

⇒ y = Rs. 25,

Therefore price of costlier wheat is Rs. 25 /Kg.