.If sinθ x cosθ = ½ . The value of sinθ cosθ is where 0°< θ< 90°
1). 0
2). $\sqrt{2}$
3). 2
4). 1
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%
.Instead of multiplying by 25, a student multiplies that number by 52 and gets 324 more than correct answer. Then that number is
1). 15
2). 12
3). 25
4). 32
The mean of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct
mean is:
1). 39
2). 39.7
3). 40.3
4). 42.7
AD is the Median of $\triangle$ ABC. If O is the centroid and AO = 10 cm then OD is
1). 5 cm
2). 20 cm
3). 10 cm
4). 30 cm