loepor 7yuo

) If we convert 135° to radian measure, we get
A.3π/4 B.3π/2 C.π/4 D.π/2 E.(3+π)/2
(5) A sector of a circle has arc length of 8 cm and the area of 16 cm2,then the radius of the
circle in cm , is
A. 2 B. 3 C.5 D. 48 E. 12
(6) A bag contains 12 white balls and some red balls. The probability of drawing a red ball is
5/11. The number of red balls is
A.10 B.12 C.22 D.5 E. None of these