Rameshwar

Answer to: PA and PB are tangents drawn to a circle with centre O. If $\angle AOB = 120°$ and $OA = 10$ cm, then

Given:
PA and PB are tangents to a circle with center O.
∠AOB = 120°, OA = OB = 10 cm...

Answer to: The give figure shows a circle with centre O and radius 4 cm circumscribed by $\triangle ABC$. BC touches the circle at D such that BD = 6 cm, DC= 10 cm. Find the length of AE.

$ \text{Given:} $
A circle with center O  and radius 4  cm is inscribed in $ \trian...

Answer to: Nidhi received simple interest off Rs. 1200 when invested Rs x at 6% p.a. and Rs y at 5% p.a. for 1 year. Had she invested Rs. x at 3% p.a. and Rs. y at 8% for that year, she would have received simple interest of Rs 1,260. Find the values Rs. x an y.

Let the amounts invested by Nidhi be x and y in Rs.
The formula for simple interest is:
$ SI =...

Answer to: Solve the following pair of linear equations by graphical method : $2x + y = 9$ and $x - 2y = 2$

$ Given equations: $
$ 2x + y = 9 \quad \cdots (1) $
$ x - 2y = 2 \quad \cdots (2) $...

Answer to: Find the sum of first 20 terms of an A.P. whose nth term is given by $a_n = 5 + 2n$. Can 52 be a term of this AP.?

Given the nth term of an arithmetic progression:
$ a_n = 5 + 2n $

To find the su...