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A man buys 3 cows and 8 goats in $ 47,200. Instead if he would have bought 8 cows and 3 goats, he had to pay $ 53,000 more. Cost of one cow is:
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- $ 11,000
- $ 12,000
- $ 13,000
- $ 10,000
Correct Option: B
Suppose the C.P. of a cow be p and that of a goat q.
According to question ,
3p + 8q = 47200 ....(i)
8p + 3q = 100200 ....(ii)
By equation (i) × 3 – (ii) × 8,
9p + 24q – 64p – 24q = 141600 – 801600
⇒ 55p = 660000
| ⇒ p = | = $ 12000 | 55 |
