Question
Download Solution PDFThere are deer and peacocks in a zoo. By counting heads they are 80. The number of their legs is 200. How many peacocks are there?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:There are deer and peacocks in a zoo. By counting their heads, total number is 80. The total number of their legs is 200.
Formula used:
Let the number of deer be D and the number of peacocks be P.
D + P = 80
4D + 2P = 200
Calculation:
D + P = 80
⇒ P = 80 - D
4D + 2P = 200
⇒ 4D + 2(80 - D) = 200
⇒ 4D + 160 - 2D = 200
⇒ 2D = 40
⇒ D = 20
P = 80 - D
⇒ P = 80 - 20
⇒ P = 60
Hence, "Option 4" is the correct answer.
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