A man has a few of chickens and cows. The number of hens will be: if the number of heads is 48 and the number of feet is 140, the number of hens will be:
A. 22
B. 23
C. 24
D. 26
Answer:D
A man has a few of chickens and cows. The number of hens will be: if the number of heads is 48 and the number of feet is 140, the number of hens will be:
A. 22 B. 23 C. 24 D. 26
Explanation: Let x be the number of hens and y be the number of cows.As a result, x + y = 48.... (i) 2x + 4y = 140, x + 2y = 70, etc... (ii),We obtain x = 26, y = 22 when we solve I and (ii).The correct answer is 26.