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What is mean by education

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What is mean by education

Posted by Uday Kumar 5 years ago

CBSE > Class 08 > Science

2 answers

J.Jaya Krishna 5 years ago

In a group of cows and chickens, the number of legs was 14 more than twice the number of heads. The number of cows was: (a) 5, (b) 7, (c) 10, (d) 12, (e) 14 Solution: Let the number of cows be x and their legs be 4x. Let the number of chicken be y and their legs be 2x. Total number of legs = 4x + 2y. Total number of heads = x + y. The number of legs was 14 more than twice the number of heads. Therefore, 2 × (x + y) + 14 = 4x + 2y. or, 2x + 2y + 14 = 4x + 2y. or, 2x + 14 = 4x [subtracting 2y from both sides]. or, 14 = 4x – 2x [subtracting 2x from both sides]. or, 14 = 2x. or, x = 7 [dividing by 2 on both sides]. Therefore, the number of cows = 7. Answer: (b)

Himanshu Bhati 5 years ago

-3+25=17x-8x 9x=22 x=22/9fraction value

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