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Ans- B, National Science Day is celebrated in India on 28 February each year to mark the discovery of the Raman effect by Indian physicist Sir Chandrashekhara Venkata Raman on 28 February 1928. He was conferred the Nobel Prize in Physics in 1930.
ABC is a right angled triangle. ∠ BAC = 90o and ∠ ACB = 60o. What is the ratio of the circum radius of the triangle to the s...
The lengths of three medians in a triangles are 21 cm, 28 cm, 35 cm. What is the area of that traingle (in cm 2 )?
In ΔABC, PQ is parallel to BC If AP: PB= 3:2 and AQ= 6 cm, AC is equal to?
In a circle with center O and radius 10 cm, two chords AB and CD are parallel and 6 cm apart. If the length of chord AB is 16 cm, what is the length of ...
In the given figure. ABCDEF is a regular hexagon whose side is 6 cm. APF, QAB, DCR and DES are equilateral triangles. What is the area (in cm2
If O is circumcentre of acute angled triangle ABC, if ∠ BOC = 60˚ then ∠ BAC = ?
If I is the incentre of ΔABC , if ∠ BAC = 800 , then what is the measure of ∠ BIC?
Find the distance between two parallel chords of length 24 cm each in a circle of diameter 25 cm?
If G is the centroid and AD, BE, CF are three medians of ∆ABC with area 216 cm 2 , then the area of ∆AGF is?
What will be circumradius of a right angle triangle whose base is 9 cm & height is 40 cm ?