Mathematics

Problem

\triangle PQR

, points

S

PQ

and

T

PR

are such that

PS = 3\,\text{cm}

SQ = 5\,\text{cm}

PT = 3x\,\text{cm}

and

TR = 10\,\text{cm}

. For which value of

x

will

ST \parallel QR

? a)

x=1.25

x=2

x=5

x=6