Question

Question 7.
a) Marbles of diameter 1.4cm are dropped into a cylindrical beaker of diameter
7cm containing some water. Find the number of marbles that should be
dropped into the beaker so that the water level rises by 5.6cm.
b) The marks obtained by the students in an examination are given below:
[4]
[6]
Marks
00 - 10 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 701 70 - 80 80 - 90/90 - 100
40
No. of
5 10 11 20
27 38
29 14 6
students
Using a graph paper, draw an ogive for the above distribution and estimate the
median mark and the number of students who obtained more than 75% marks.
Question 8.
a) If AABC O APQR, AB = 4cm, PQ = 6cm, QR = 9cm and RP = 12cm, find
the perimeter of AABC.
[3]
b) If the nth term of an A.P. is (2n + 1), find the common difference and 25th term. [3]
c) Use graph paper to answer these questions:
[4]
i) Plot the points A(4,7) and B(1,2).
ii) If A' is the image of A when reflected in X-axis, write the coordinates of A'
iii) If B' is the image of B when reflected in the line AA', write the coordinate of B'.
iv) Give the geometrical name of the figure ABA'B'.​

Answer 1

Answer:

this much bigger questions is only not there

Answer 2

Answer:

3. निम्न में सही या गलत लिखिये :-

(i) प्रत्येक बहुपद एक समीकरण भी होता है।

(ii) प्रत्येक बहुपद द्विपदी होता है।

(ii) द्विपदी बहुपद की घात 5 भी हो सकती है।

(iv) यदि 2 बहुपद q(x) का एक शून्यक है तो 2 बहुपद 2xq(x) का शून्यक भी होगा।

भी शन्यकभी होगा