Answer:
The correct answer is Option D. 20
Explanation:
From the figure we get,
<RUS = 90° because RU ⊥ TS
To find the value of x
It is given that <RUS = 4x + 54
Therefore we can write,
4x + 54 = 90
4x = 90 - 54 = 36
x = 36/4 = 9
To find RS
It is given that,
RS = 3x - 7 = 3*9 -7 = 20
Therefore the correct option is Option D . 20