QA – Placement Quizzes | Algebra | Question 13

A zoo has some peacocks and some horses. If the number of heads be 48 and the number of feet be 140, then the number of peacocks will be:
(A) 23
(B) 25
(C) 26
(D) 27


Answer: (C)

Explanation: Let there be x peacocks and y horses. Then,
x + y = 48 (equation 1)
and 2x + 4y = 140
x + 2y = 70
Substituting the value of x from equation 1, we get
48 -y + 2y = 70
y = 22
Then, x = 48 – 22 = 26.

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