If x+3y= -3x+y, then is $\frac{x^{2}}{2y^{2}}$ equal to
1). ⅛
2). ½
3). ¼
4). 4
The average age of 30 boys in a class is 10 years. If the age of their teacher is also included, the average increases by one year. The teacher's age in
years is
1). 38
2). 40
3). 30
4). 41
The centroid of an equilateral triangle ABC is G. If AB is 6 cms, the length of AG is
1). √3 cm
2). 2√3 cm
3). 3√2 cm
4). 2√2 cm