In the diagram above, PQ = 10 cm, PS = 8 cm and ∠PSR is 60o while ∠SRQ is a right angle. Find SR
Attached Figure / Diagram
A
14 cm
B
14√3 cm
C
10 cm
D
10√3 cm
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
In ΔPST; cos 60 = ST/8
ST = 8cos 60
ST = 8 x 1/2 = 4
TR = 10 cm (opp. sides of a rectangle PQRT)
SR = ST + TR
SR = 4 + 10
SR = 14 cm
Source: Myschool Past Questions Archive (Record #8983)