Question

If 3√5+√125=17.88, then what will be the value of √80+6√5 =?
A) 13.41 B) 20.46 C) 21.66 D) 22.35

Answer 1

Answer:

c

Step-by-step explanation:

no explanation

cause i dont know plzz dont follow it

Answer 2

Answer:

$3 \sqrt{5} + 5 \sqrt{5} = 17.88 = 8 \sqrt{5}$

$\sqrt{5} = \frac{17.88}{8}$

now,

$\sqrt{80} + 6 \sqrt{5} = \sqrt{16 \times 5} + 6 \sqrt{5} = 4 \sqrt{5} + 6 \sqrt{5} = 10 \sqrt{5} = 10 \times \frac{17.88}{8} = \frac{178.8}{8} = 22.35$

so option (D) correct. Thanks