Q. 1) Find [3M] a) 0.4 x 2.5 b) 63.7 ÷ 10 c) 56.08 29.128
Q. 2) In the following fig, XY || ZW and PQ || RS, Find the value of a, b and c. [3M] 11 -55
Q.3) The product of two rational numbers is 12. If one of the numbers is 84 , find the other. [3M] 25²x 6³ x 29
Q.4) Simplify: [3M] 12 4
Q.5) A ribbon of 11 cm is taken to tie a gift box. Of the given ribbon only unused? 10 cm is used. What length of the ribbon remains [3M]
please answer fast please answer
Answers
Answer:
A1)a)1
b)6.37
c) (Addition ) 85.208
A2)In a triangle line joining mid - point of two sides are parallel and half of third side
PQ∥AB
PQ=
2
1
AB→(i)
QR∥BC
QR=
2
1
BC→(ii)
PR∥AC
PQ=
2
1
AC→(iii)
fromequation(i)(ii)
two pairs are parallel so, BPQR is a parallelogram
BP=QR=
2
BC
→(iv)
In parallelogram diagonals bisects each other so
X is mid -point to PR. Similarly,
Y is mid- point on QP
InΔRPQ
XY=
2
1
QR
XY=
2
1
(
2
1
BC)
4
1
BC
A3)Given
Product of two rational numbers =−11/12
One of the number =
2
9
4
=22/9
The other number is calculated as below
−11/12÷22/9
=−11/12×9/22
We get,
Therefore, the other number is −3/8.
4A) 9
5 A)( 11/10)m can be written as 1.1m and (11/2)m as 5.5m. So the question comes down to “How many ribbon of length 1.1m can be cut from a ribbon of 5.5m”…..basic arithmatic.
No. of ribbons got=(5.5m/1.1m)=5 (ans)