A river is flowing with a speed of 8 km/h.a swimmer wants to reach point R from P.he swims with a speed of 8km per h.at an angle of theta greater than 90degree w.r.t river flow.if PQ=QR=800mthen value of thea is????????!option are,90°,.60°,45°,30°

Answer 1

I think you need to clear this up.
Where are Q and R in relation to P?
You have said that θ > 90°, yet none of the choices is greater than 90°. Eh?

However, you appear to have an isosceles right triangle ...