Question

★ 50 points ★
but , Answer should be perfect !!

if know then Answer otherwise quit !!
spam deleted
now ,
look question
and explain it

Answer 1

$\huge\bf{Answer:-}$

Yes

Explanation:

Refer the above given attachment.

Answer 2

Explanation:

Speed of light is in vacuum 299,792,458 m/s.

Hence, metre is defined on the basis of this speed.

Taking some standard easier number would have yielded a small error in the standard value of metre.

One second is a big time interval when one wants to set a measure for some standard quantity to a very large accuracy.

Hence, taking one second is not feasible either.