.If sinθ x cosθ = ½ . The value of sinθ cosθ is where 0°< θ< 90°
1). 0
2). $\sqrt{2}$
3). 2
4). 1
if 2x+$\frac{1}{4x}$=1, then value of $x^{2}+\frac{1}{64x^{2}}$ is
1). 0
2). 1
3). 1/4
4). 6
A car travels 80 km in 2 hours and a train travels 180 km in 3 hours . The ratio ofspeed of the car to the train is
1). 2:3
2). 3:2
3). 3:4
4). 4:3
The length of a rectangle is increased by 25%. To maintain the same area, the breadth has to be decreased by
1). 20%
2). 25%
3). 30%
4). 40%
O is the circumcentre of $\triangle$ABC. If AO = 8 cm, then the length of BO is
1). 12 cm
2). 3 cm
3). 6 cm
4). 8 cm