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SSC CGL Tier 2 Exam 12 Apr 2015 Paper
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© examsnet.com
Question : 56
Total: 100
In a farm there are cows and hens. If heads are counted they are 180, if legs are counted they are 420. The number of cows in the farm is
130
150
50
30
Validate
Solution:
(4) A cow and a hen each has a head.
If the total number of cows be x, then
Number of hens = 180 – x
A cow has four legs and a hen has two legs.
∴ (180 – x) × 2 + 4x = 420
⇒ 360 – 2x + 4x = 420
⇒ 2x = 420 – 360 = 60
⇒ x =
60
2
= 30
© examsnet.com
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