Q19. By which smallest number 90 must be multiplied so as to make it a perfect square ?
(a) 10 (b) 2 (c) 5 (d) 3
Answers
Answered by
14
On multiplying with 10 we get 900 which is a perfect square of 30
while in other cases perfect square is not formed
while in other cases perfect square is not formed
Answered by
59
Heya,
The smallest to be multiplied with 90 so as to obtain a perfect square is 10.
90×10=900
square root of 900 is 30.
Therefore option a is correct
Hope it helps u..
The smallest to be multiplied with 90 so as to obtain a perfect square is 10.
90×10=900
square root of 900 is 30.
Therefore option a is correct
Hope it helps u..
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