Explanation

20 x w x 5 = W

10 x w x X = W 

Equating both equations, we get,

10 x W x X = 20 x w x 5

X = 100/ 10 

X = 10 

ND5-07-2023

Explanation

The secretary was promoted because of his outstanding performance.

promoted: raise (someone) to a higher position or rank.

"promoted" is best to keep the meaning of the original sentence

ND13-07-2023

Explanation

The meaning of STATUS QUO is the existing state of affairs. 

The status quo is the current state of things.

"status quo" is best to keep the meaning of the original sentence

ND13-07-2023

Explanation

the square root of 8 is an irrational number.

A rational number is any number that can be written in the form of p/q,

where p and q are both integers and q≠0.

So √8 is not a rational Number

ND5-07-2023

Explanation

It is given a,b,c, and d are in proportion.

The product of means(a:b) is equal to the product of extremes(c:d).

Therefore, ad = bc is the correct option

ND5-07-2023