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Question 1
Find the product of the following expression
(a) 11, 7x
(b) - 4x, y
(c) - 4p, pq, pr
(d)4p
3, - 3p, p
2
(e) 3mn, 4n
f) 51p, p
2, p
8
g) 2p, 4q, 8r
h) xy, 2x
2y, 2xy
2, xy
i) a, 2b, 3c
j) xy, yz, zx
k) 2, 4y, 8y
2,16y
3
l) a, 2b, 3c, 6abc
m) p, - pq, pqr
Solution
a) 77x
b)-4xy
c) -4p3qr
d) -12p6
e) 12mn2
f)51p11
g) 64pqr
h) 4x5y5
i) 6abc
j)x2y2x2
k) 1024y6
l) 36a2b2c2
m) -p3q2r
Question 2
Volume of the cuboid with Length as 2x,breath as 2y and Height as 2 z is given by
a) xyz
b) 8xyz
c) 2x+2y+2z
d) None of these
Solution
Volume of the cuboid= L*B*H= (2x)(2y)(2z)=8xyz
So Answer is (b)
Question 3
The sum of area of the squares of side 2a and 2b will be
a) 2a+ 2b
b) 4a
2 + 4b
2
c) ab
d) None of these
Solution
Area of Square= (Side)2
So The sum of area of the squares of side 2a and 2b=4a2 + 4b2
So Answer is (b)
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