Correct Answer - B
As we know the `omega_("reflected ray") = 2 omega_("mirror")`
`omega_(R)= 2 xx 2pi xx (9)/(pi)= 18 xx 2 = 36 therefore v_(S) "cos"37^(@) = v`
`v_(S) = v"sec" 53^(@) = Romega_(R)"sec"53^(@) = 10 ("sec"53^(@))^(2) xx 18`
=` 10 xx ((5)/(3))^(2) xx 18 xx 2 = 1000 "m"//"s"`