Question
A ray of light is incident on an interface separating
two media along the normal to the interface. The angle between the incident ray and refracted ray is equal to:Solution
The correct answer is A
Ravi scored 95, 88, 102, 110, 76 and 91 marks in History, Chemistry, Biology, Mathematics, English and Computer respectively. What is the average of his...
The average weight of 6 people is 80 kg. When two new people with their weights in the ratio 2:3 joined the group, the average weight of all the people ...
The average age of a group of 10 students is 30 years. Two persons of age 12 years and 10 years, left the group and 2 persons of age 20 years and 12 yea...
The average weight of 20 boys is 48 kg. However, the weights of three boys, originally 46 kg, 44 kg, and 38 kg, were incorrectly ...
- The average age of (x + 6) students of a class is 16 years. If the 40 years old class teacher is also included then average age of the class gets increased...
A number is such that when it is multiplied by 4, it gives another number which is as much above from 180 as the original number (itself) is below 180. ...
A number is such that when it is multiplied by 5, it gives another number which is as much above from 210 as the original number (itself) is below 210. ...
The average age of a family of 6 people is 45 years. If the grandfather passes away, the average age drops to 40 years. Find the age of the grandfather.
The average age of a group of 9 teachers is 50 years. When the principal retires, the average age of the remaining teachers drops to 45 years. Find the ...
The average expenditure of Mr. Sharma for January to June is Rs. 4200 and he spent Rs. 1200 in January and Rs. 1500 in July. The average expenditure for...
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