जॉइन Examsbookउत्तर : 3. "12"
In a group of buffaloes and ducks the number of legs are 24 more than twice the number of heads. What is the number of buffaloes in the group ?5
प्र: In a group of buffaloes and ducks the number of legs are 24 more than twice the number of heads. What is the number of buffaloes in the group ?
- 16false
- 218false
- 312true
- 424false
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उत्तर : 3. "12"
व्याख्या :
Answer: C) 12 Explanation: Let the number of buffaloes be x and number of ducks be y. Now, number of heads = x+y Number of legs = 4x+2y .......(1) But given that legs = 2(x+y)+24 ......(2) solving (1) & (2),we get 4x+2y=2x+2y+24 --> x=12. Therefore number of buffaloes =12