Class 11th Maths – RD Sharma Chapter 4 : Measurement Of Angles Multiple Choice (MCQs) Solutions
-
Mark the correct alternative in each of the following:
- If D, G and R denote respectively the number of degrees, grades and radians in an angle, then
(a) D/100 = G/90 = 2R/π
(b) D/90 = G/100 = R/π
(c) D/90 = G/100 = 2R/π
(d) D/90 = G/100 = R/2π Watch Solution- If the angles of a triangle are in A.P., then the measure of one of the angles in radians is
(a) π/6
(b) π/3
(c) π/2
(d) 2π/3 Watch Solution - The angle between the minute and hour hands of a clock at 8:30 is
(a) 80°
(b) 75°
(c) 60°
(d) 105° Watch Solution - At 3:40, the hour and minute hands of a clock are inclined at
(a) 2π/3^c
(b) 7π/12^c
(c) 13π/18^c
(d) 3π/4^c Watch Solution - If the arcs of the same length in two circles subtend angles 65° and 110° at the centre, then the ratio of the radii of the circles is
(a) 22 : 13
(b) 11 : 13
(c) 22 : 15
(d) 21 : 13 Watch Solution - If OP makes 4 revolutions in one second, the angular velocity in radians per second is
(a) π
(b) 2 π
(c) 4 π
(d) 8 π Watch Solution - A circular wire of radius 7 cm is cut and bent again into an arc of a circle of radius 12 cm. The angle subtended by the arc at the centre is
(a) 50°
(b) 210°
(c) 100°
(d) 60°
(e) 195° Watch Solution - The radius of the circle whose arc of length 15 π cm makes an angle of 3π/4 radian at the centre is
(a) 10 cm
(b) 20 cm
(c) 11 1/4 cm
(d) 22 1/2 cm Watch Solution