Mathematics

Problem

\triangle ABC

is right-angled at

B

. Another triangle

\triangle PQR

is right-angled at

Q

. If

AB = 6\,\text{cm}

BC = 8\,\text{cm}

PR = 10\,\text{cm}

and

PQ = 6\,\text{cm}

, then

QR

equals a)

12\,\text{cm}

7\,\text{cm}

8\,\text{cm}

6\,\text{cm}