Urooz AliVelocity-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 … Read more
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 … Read more
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 … Read more
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 … Read more
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 – … Read more
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 … Read more
ABCD is a parallelogram , a line trhough A cuts DC at oint F and BC produced at E Prove that ∆ BCF is equal in area to ∆ DFE. Construction: AC is joined. AB || CD and AD || BC .Now ∆ ACE and ∆ DCE are on the same base CE and between … Read more
Question 1:What did the traveler see in the desert ? Answer 1: The traveler from the ancient land saw a broken statue in the desert . There he saw two large and trunkless legs of stone standing in the desert. Near them on the sand was the face of the statue half – sunk in … Read more
गर्म गर्मी के बाद हम बरसात के दिन का लिए इंतजार करते हैं । बारिश का मौसम जून के महीने से शुरू होता है और अगस्त तक जारी रहता है। बारिश की पहली बौछार दिन के गर्म धूप को धो देता है और बेचैन कर देने वाली गर्मी से राहत देता है बारिश के दिन … Read more
Students need not rush from shop to shop at last time of evening for school photographs project work. Click on this image , print it and cut into pieces to use it. That is all. Relax and concentrate on your study.