# Month: September 2015

## Importance of Forest Essay in Hindi | वन का महत्व निबंध |

वन प्राण हैं – वन हमारी शान हैं || वन मुख्य रूप से लकड़ी के स्रोत के लिए जाने जाते हैं। लेकिन वास्तविक रूप से वन इससे बड़ा काम करते हैं। वन जलवायु को नियंत्रित करने मे बड़ी भूमिका निभाते हैं । ये प्रदूषण को भी नियंत्रित करते हैं। सबसे बड़ी बात यह है की…

## The Ballad of Father Gilligan English Literature for Class 8

Q(01) Why was Father Gilligan ‘weary’? Why was he unable to rest? Ans: Father Gilligan was tired because he has to work night and day. Most of the people in the village were either sick or have died. At their sick bed, they were calling father Gilligan for prayer and a peaceful journey of the…

## Velocity Time Graph For Class 9 | Physics

Velocity-Time graph gives two most important parameter. 1) Its slope gives the acceleration. 2. The area under the curve gives the distance traveled by an object.Here we will derive velocity(v = u + at) equation as shown the figure. And we will also derive graphically distance (s = ut + 1/2 a t2) equation. Analytically…

## Postmaster for Class 8 Question Answer English Literature

Reference to The Context (1)Thus they talked about half forgotten incidents, forgetting about matters of greater importance, and often it would get very late. Q(a): Who does ‘they’ refer to? What would they talk about ? Ans. : They referred to Ratan and the Postmaster. They would talk about Ratan’s family.Postmaster used to ask Ratan…

## Prateek travels from Agra to Delhi to buy goods which he get 10 % cheaper in Delhi

Prateek travels from Agra to Delhi to buy goods which he gets 10 percent cheaper in Delhi than in Agra . if his journey expenses are Rs. 160.00 and he earns Rs. 240.00 by selling goods at Agra; calculate : i) the price of the goods at Delhi and ii) his profit percent Solution: Let…

## Heaven’s Lake Question Answer For Class English Literature

Q(01) Briefly describe the author’s journey from Urumqi to Heaven Lake . What does Heaven Lake look like ? Ans: Author went to Heaven Lake from Urumqi by a public bus . Soon, they were in open country side , with fields of sunflower as far as the eye could see. Where…

## Confessions of a Humorist Question Answer for Class 8 English Literature

Q(01)What was the occasion on which the author gamed reputation as a humouist? How did it happen? Ans: The occasion on which the author get reputation as a humorist was the fiftieth birthday of the senior partner , of the store where narrator worked. The employees in the store bought a silver inhstand for…

## OP, OQ and OR are drawn perpendiculars to the sides BC, CA and AB of ∆ ABC |Prove that AR2 +BP2 +CQ2 = AQ 2 + CP 2+BR2

In the following figure, OP, OQ and OR are drawn perpendiculars to the sides BC, CA and AB respectively of triangle ABC. Prove that AR2 +BP2 +CQ2 = AQ 2 + CP 2+BR2 solution : Construction : joinA-0, BO and CO . For ∆ OAR, we can write:AR2 = OA2 – OR2 —— Eqn. (I)For…

## Diagonals of rhombus ABCD intersect each other at point O. Prove that OA2+ OC2=2AD2-BD2/2

Question: Diagonals of rhombus ABCD intersect each other at point O. Prove that OA2 + OC2= 2AD2 + BD2/2 Solution: In ∆ AODOA2 = AD2 – OD2 ————-Eqn (i) In ∆ OBCOC2 = BC2 – OB2 ————-Eqn (ii) Adding Eqn (i) & Eqn (ii) We get,OA2 + OC2 = AD2 – OD2 + BC2 –…

## AB = BC and AD is perpendicular to CD. Prove that AC2 = 2.BC. DC

Question:In the figure AB = BC and AD is perpendicular to CD. Prove that AC2 = 2.BC. DC solution :In ∆ ADC AC2 = AD2 + DC2 AC2 = AB2 – BD2 + DC2(AS ABD is a right angled triangle)or AC2 = AB2 + DC2 – BD2 AC2 = AB2 + DC2 – ( DC-BC…