Multiple choice

The cost price of a laptop is Rs 1500 more than the cost price of a mobile. The mobile and laptop are sold at 20% profit and 24% profit respectively. If the difference between the selling price of the mobile and the laptop is Rs 2400, then find the cost price of the mobile?

  1. 12000

  2. 12600

  3. 15000

  4. 13500

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let mobile CP be x. Then laptop CP = x + 1500. Mobile SP at 20% profit = 1.2x. Laptop SP at 24% profit = 1.24(x + 1500) = 1.24x + 1860. Difference = (1.24x + 1860) - 1.2x = 0.04x + 1860 = 2400. Solving: 0.04x = 540, so x = 13500.