Solution: Here, AC= 12cm We know, length of diagonal sof rectangle are equals. So,  AC = BD i.e;  BD = .....

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Here, 85o + 1200 + x0 + 700 = 3600 [∵ sum of angles of a point is equal to 3600] or, x0 + 2750 = 3600 or, x0 = 3600 - 2750 or, x0 = 850 Therefore, the value of x .....

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Mass of a proton is 1.0072766 a.m.u.  Mass of electron is 9.10938356 × 10-31 kilograms A proton has about 1836 times the mass of an .....

Chromatography is a technique of separating the constituents of a mixture of liquids. These substances should be such that they do not go undergo a chemical reaction with each other. The medicines mixed in the blood can be identified by .....

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Observation: Now, from the centre of the filter paper different types of colours present in black ink are .....

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A chart showing the effect of acid and base on red litmus paper and methyl orange is shown as follows: Substance Red Litmus Paper Methyl orange Acid No .....

Tobacco mosaic virus (TMV) was the first virus to be discovered. It has a rod-like appearance. It was discovered and isolated from tobacco by Wendell Stanley in .....

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Here, DM and BN are bisector of ∡D and ∡B repectively. So, a) ∡ADM = ∡CDM = ∡ABN = ∡CBN [  ∡D = ∡B, being opposite angles of parallelogram]  Now in ∆ADM and ∆BCN  (i) ∡ADM .....

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Long-sightedness is when the short distance vision is weak and short-sightedness is when the long distance vision is weak. In long-sightedness, the reflections of objects are focused behind the retina. and in short-sightedness, the reflections .....

A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons .....

The cause of the mental disease is very difficult to identify. It can take months, and sometimes years, for doctors to accurately diagnose a mental illness. Some reasons for this are: 1. Symptoms of the mental disease often overlap.   .....

Step up transformer produces more voltage at the output because more voltage is developed across the secondary coils than primary. A number of loops in a coil mean higher voltage not higher current, as more number of coils lead to higher .....

Productive and unproductive labour: In the past, the labour was classified in two groups. They are productive and unproductive labour.  The work that gave profit directly was known as productive labour. The work that didn't give any .....

क) पाल ख) आँखा ग)  झार घ) चन्द्रमा ङ) दिनु च) .....

p4 + p2 + 1             = (p4 + 2p2 + 1) – p2             = [(p2)2 + 2p2 + 1] – .....

Solution,  2x + 2x+5 = 66 or, 2x + 2x ⨯ 25 = 66 or, 2x(1 + 25) = 66 or, 2x (1 + 32) = 66 or, 2x ⨯ 33 = 66 or, 2x = 66/33 or, 2x = 2 ∴ x = .....

Here,  [ a + 3 b] / [3a + 2b] = 4/5 Cross multiplying we get 5[ a + 3 b] = 4 [3a + 2b] or, 5a + 15b = 12a + 8b or, 15b - 8b = 12a - 5a or, 7a = 7b or, a/b = 7 / 7 or, a/b = 1/1 Hence, a:b = 1 : .....

We have given, x + y = 6.................i); 2x - y = 3..................ii) Adding these equations,  x + y = 6 2x - y = 3 ____________ 3x = 9 or, x = 9 / 3  = 3 Put x = 3 in equation (i), 3 + y = 6 or, y = 6 - 3 = 3 Hence,  .....

Solution: 7x2 - 28x = 0 or, 7x (x - 4) = 0 Either, 7x = 0          Or, x - 4 = 0 ∴ x = 0                     ∴ x = .....

Following are the obligations and prohibitions to be followed at a cinema hall: - The audiance should buy a tickets befor an hour. - The audiance must reach the theater half an hour earlier. - The audiance are supposed to switch off their mobile .....

i) Red faced - ruddy face ii) Readymade - starched iii) Unwilling and therefore slow to cooperate agree etc. - frowning and shaking his head iv) Made the dirty surface of something clean by rubbing it with something rough. - scoured v) Moved the .....