Which similarity statement is true?
δsrq ~ δtrs
δsrq ~ δrtq
δsrq ~ δrts
δsrq ~ δqrt

ΔSRQ~ΔRTQ

Since ∠R and ∠T are both right angles, they must correspond in the similarity statement.  In the larger triangle, SQ is the hypotenuse; in the smaller triangle, RQ is the hypotenuse.  This means that SQ and RQ must correspond in the similarity statement.  This makes the 3rd one the best option.

The difference is 5,100m?