15 kg of ₹10 per kg wheat is mixed with 5 kg of another type of wheat to get a mixture costing ₹30 per kg. Find the price (per kg) of the costlier wheat.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. ₹90.
The cost of 15 kg wheat = ₹10 × 15 = ₹150
Let the cost of costlier wheat = ₹x/kg
The total cost of the mixture = ₹30 × (15 + 5) = ₹600
So, 150 + 5x = 600
⇒ 5x = 600 - 150 = 450
⇒ x = 450/5 = 90
Therefore, the costlier wheat price (per kg) is ₹90.