Vector Algebra CBSE Maths 12 Science MCQ Answers in English to enable students to get Answers in a narrative video format for the specific question.

Expert Teacher provides Vector Algebra CBSE Maths 12 Science MCQ Answers through Video Answers in English language. This video solution will be useful for students to understand how to write an answer in exam in order to score more marks. This teacher uses a narrative style for a question from Vector Algebra not only to explain the proper method of answering question, but deriving right answer too.

Please find the question below and view the Answer in a narrative video format.

** Question:**

** Find the projection of the vector on the vector **

** Answer Video in** **English****:**

You can select video Answers from other languages also. Please check Answers in ( Hindi )

**Question 1** : P and Q are two points with position vectors and respectively. Write the position vector of a point R which divides the line segment PQ externally in the ratio 2:1. (View Answer Video)

**Question 2** : Find a vector in the direction of vector which has magnitude 21 units. (View Answer Video)

**Question 3** : Find the sum of the vectors and (View Answer Video)

**Question 4** : Find a unit vector in the direction of (View Answer Video)

**Question 5** : Find the magnitude of two vectors a and b having the same magnitude and such that the angle between them is and their scalar product is 1/2. (View Answer Video)

**Question 1** : A bag I contains 5 red and 4 white balls and a bag II contains 3 red and 3 white balls. Two balls are transferred from the bag I to the bag II and then one ball is drawn from bag II. If the ball drawn from the bag II is red, then find the probability that one red ball and one white ball are transferred from the bag I to the bag II. (View Answer Video)

**Question 2** : A die is thrown 6 times. If 'getting an odd number' is a 'success', what is the probability of obtaining:

atleast 5 successes?

(View Answer Video)

**Question 3** : Compute P(A/B) if P(B) =0.5 and P(AB)=0.32. (View Answer Video)

**Question 4** : A pair of coins is tossed once. Find the probability of showing atleast one head. (View Answer Video)

**Question 5** : A bag contains 4 green and 6 white balls. Two balls are drawn one by one without replacement. If the second ball drawn is white, what is the probability that the first ball drawn is also white? (View Answer Video)

**Question 1** : Sand is pouring from a pipe at the rate of . The falling sand forms a cone on the ground in such a way that the height of the cone is always one-sixth of the radius of the base. How fast is the height of the sand cone increasing, when the height is 4 cm? (View Answer Video)

**Question 2** : Find the maximum profit that a company can make if the profit function is. (View Answer Video)

**Question 3** : The point on the curve which is nearest to the point (0, 5) is (View Answer Video)

**Question 4** : The line y=mx+1 is a tangent to the curve if the value of m is ________. (View Answer Video)

**Question 5** : If the radius of a sphere is measured as 9 m with an error of 0.03 m, then find the approximate error in calculating its surface area. (View Answer Video)

**Question 1** : Find the area enclosed by the parabola and the line 2y = 3x + 12. (View Answer Video)

**Question 2** : Using integration, find the area of the region bounded by the triangle whose vertices are (-1, 2), (1, 5) and (3, 4). (View Answer Video)

**Question 3** : Find the area of the region enclosed by the parabola the line y = x + 2. (View Answer Video)

**Question 4** : Find the distance between the point (5, 4, -6) and its image in xy-plane. (View Answer Video)

**Question 5** : Using integration, find the area bounded by the tangent to the curve at the point (2, 1) and the lines whose equations are x = 2y and x = 3y - 3. (View Answer Video)