WBJEE · Maths · Sequences and Series
G.M. and H. M. of two numbers are 10 and 8 respectively. The numbers are :
- A 5,20
- B 4,25
- C 2,50
- D 1,100
Answer & Solution
Correct Answer
(A) 5,20
Step-by-step Solution
Detailed explanation
Hints: \(\sqrt{\mathrm{ab}}=10 \Rightarrow a b=100\) \[ \begin{aligned} & \frac{2 a b}{a+b}=8 \\ & a+b=25 \end{aligned} \] So \(a=5, b=20\)
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