Question

Q2. sum of cp's of two cows is rs. 13, 000. both the cows are sold at a profit of 20% and 40% respectively with their sp's being the same. what is the difference of cp's of both the cows? (a) rs. 1,000 (b) rs. 2, 000 (c) rs. 1, 500 (d) rs. 2, 500

Answer 1

let CP of cow A be x
CP of cow B be (13000-x)
SP of cow A = x × 6/5
SP of cow B = (13000-x) × 7/5

sp of both cow are equal
6/5x = (13000-x) × 7/5
6/5x = 91000-7x/5
6x + 7x = 91000
x = 7000