Question
Why do starts twinkle in the
sky?Solution
It is an example of optical illusion. They appear to twinkle, because light from the stars has to cross several layers of atmosphere with differing refractive indices to reach earth. As the atmospheric conditions in the different layers keep changing, the starts also appear to fade and shine at different times. Hence, option D is correct.Â
A circle is inscribed in a triangle ABC with sides 12 cm, 16 cm, and 20 cm. What is the radius of the circle?Â
Marked price of an article is Rs. M, as it is marked by a certain price. Find the value of M.
Statement I. If the shopkeeper gives a discount of ...
The radius of a cylinder is 3 cm and its height is 10 cm. What is its total surface area?
Calculate the percentage contribution of the South branch's total revenue to the company's total revenue over the three years (2021-2023).
I). p 2  – 5p – 126 = 0
II). q 2  + 9q – 90 = 0
'P' sold an item at a profit of 40%. If the cost price of the item had been Rs. 150 less and its selling price had been Rs. 30 mo...
In the each question, the given two series following the same pattern, then find the pattern used in the 1st series and use the pattern to find the unkn...
What is the average annual production of Crop C over the five years?
If (x – 1/x = 5√2), then find the value of {(x4 + 1/x4 ) ÷ 1351}.
What is the total revenue generated from all products in January?
Relevant for Exams:
