Question

Please I need help to go about this question.

Answer 1

Answer:

40m

Step-by-step explanation:

since ∆QST=90 degree

by using Pythagoras theorem

QT^2=QS^2+TS^2

(50)^2=QS^2+(30)^2

2500=QS^2+900

2500-900=QS^2

1600=QS^2

√1600=QS

40=QS