Question

TO ANSWer Type Questions - 1
.
21. Find the value of 7
, if 3 = 1.732 and 5 = 2.236
OR
8(5/2+1)
Simplify: 751
_12-) and
and express as rational denominator
2. Find the value of 'k' for the equation 9kx + 12ky = 63. IfX1 and y = 1 is its solution
OR
Show that x + 3 is a factor of 69 + 14X-X X
23. In the figure, LM is a line parallel to the y-axis at a distance of 3 unit
i) What are the coordinates of P. R and Q?
ii) What is the difference between the abscissa of the points L and M?
YA
X
1,0 1 2 3
4 5
X
go
on
T
24. In the given figure, ABC is an equilateral triangle
The bisectors of ZABC and ZACB meet at O.
Find the measure of ZBOC.
25. In the given figure, find the measure of ZB'A'C'
6 cm
6 cm
600
00
B 6cm C
26. The diameters of two cones are equal. If their slant heights are in the ratio 5: 4. then find
the ratio of their curved surface areas.

Answer 1

2. Find the value of 'k' for the equation 9kx + 12ky = 63. IfX1 and y = 1 is its solution

substitute x=1 and y= 1 as given in the question.

9k + 12k =63

21k = 63

k = 63/21 = 3

26. The diameters of two cones are equal. If their slant heights are in the ratio 5: 4. then find

the ratio of their curved surface areas.

let the radii be r cm and their heights be 5x and 4x.

CSA of 1st cone = Πrl = Πr5x

CSA of 2nd cone = Πrl = Πr4x

CSA of 1st cone / CSA of 2nd cone = Πr5x / Πr4x

By cancelling the common factors - Π , r and x ;

= 5/4

ratio = 5:4

21. Find the value of 7

, if 3 = 1.732 and 5 = 2.236

OR

8(5/2+1)

Simplify: 751

_12-) and

and express as rational denominator

Question is not clear , please check once.

23. In the figure, LM is a line parallel to the y-axis at a distance of 3 unit

i) What are the coordinates of P. R and Q?

ii) What is the difference between the abscissa of the points L and M?

YA

X

1,0 1 2 3

4 5

X

go

on

T

The figure that you have mentioned in the question is not provided.

24. In the given figure, ABC is an equilateral triangle

The bisectors of ZABC and ZACB meet at O.

Find the measure of ZBOC.

25. In the given figure, find the measure of ZB'A'C'

6 cm

6 cm

600

00

B 6cm C

The figure that you have mentioned in the question is not provided.

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