Question

Q.NO:-1.
Encircle the correct answer to each of the following from the alternatives given :-
(1x6)
If piece of wire of length 32.8 cm is bent into a square, the side of the square is:
b.
8.2 cm
16.2 cm d. 32.2 cm
I.
a.
4.2 cm
C.
II.
If the area of a square field is 169 m2, its perimeter in cm is :
a. 2500 cm
b. 2700cm
C. 5200cm
d.
7200cm
The area of a rectangle is 720 cm². If breadth is 15 cm, then length is :
a. 12.5 cm
b.
50 cm
25 cm
C.
d.
75 cm
IV.
Three times x is written as :
x + 3
b. 3-X
C.
a.
d.
3x
3/x.
V.
If x = 4, y = 3, z = 1, then 2x + y + 1 is :
10
b. 11
c. 12
d. 13
a.
VI.
Which f the following is variable ?
a.
3
b. -10
C.
у
d. 15​

Answer 1

Answer:

question 1, answer is 8.2 because the length of wire is 32.8 and in square there are 4 sides therefore 32.8/4 = 8.2 .

question 2, answer is 5200 cm because area of square is side square therefore side is equal to root of 169 which is equal to 13. since side of square is 13meter therefore it's perimeter is 4 times side which is equal to 52 mete Or 5200 cm.

question no 3

area of rectangle is L*B = 720cm2

L * 15 = 720

L = 720/15 = 48cm.

question no. 4

3x

question no 5,

2x+y+1

2*4 + 3 + 1 = 8 + 3 + 1 = 12.

question no 6, answer is c options, because variable is a number which we do not know and we represent it by alphabet.