For the following questions answer them individually
The average age of A, B and C is 20 years, and that of B and C is 25 years. What is the age of A?
The simple interest on a sum of money for 3 years at an interest rate of 6% p.a. is Rs.6,750. What will be the compound interest rounded off on the same sum at the same rate for the same period, compounded annually is closest to :
In the figure, $$PA$$ is a tangent from an external point $$P$$ to the circle with centre $$O$$. If $$\angle POB = 110^\circ$$, then the measure of $$\angle APO$$ is:
In the right triangle shown in the figure ,what is the value of $$\operatorname{cosec}\theta$$ ?
Triangle $$PDC$$ is drawn in side the square $$ABCD$$ of side 24 cm where $$P$$ lies on $$AB$$. What is the area of the triangle?