Question

O (B)
O (D) 0 (A) © (C)
यदि (a+b)2 = 100 और a : b=1 : 3 हैं तो ab ज्ञात करें
(A) 10 (B) 14.50 (C) 18.75 (D) 20.50
(B)
(A)
(D)

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Answer 1

Answer:

2a +2b=100..........eq 1

3à=1b

3a-1b=0................eq 2

multiply eq 2 by 2

2a +2b=100

6a-2b=0

___________

8a=100

a =12.5

25+2b=100

2b=75

b=37.5

Answer 2

Answer:

This is a simple question of Algebra.