Question

friends please give the proper answer to this question ​​

Answer 1

Answer:

$\frac{1}{r} \: = \frac{1}{3} + \frac{1}{6} + \frac{1}{18} \\ \frac{1}{r } = \frac{6 + 3 + 1}{18} \\ \frac{1}{r} = \frac{10}{18} \\ r = \frac{18}{10} \\ r = 1.8$

so and is (d)

hope helpful, thanks....

Answer 2

Answer:

send me pics

send me pics

nice profile