752 views

The question is followed by two statements I and II.

Mark

1. if the question can be answered by any one of the statements alone, but cannot be answered by using the other statement alone.
2. if the question can be answered by using either statement alone.
3. if the question can be answered by using both the statements together, but cannot be answered by using either statement alone.
4. if the question cannot be answered even by using both the statements together.

What is the distance x between two cities A and B in integral number of kilometres?

1. x satisfies the equation $\log_2 x = \sqrt{x}$
2. $x \geq 10$ km

x>=10

and it also satisfies log x =√x

x=4

So, Ans C) if the question can be answered by using both the statements together, but cannot be answered by using either statement alone.

by
5.1k points

I think ans should be option A. Because statement 1 is enough to give distance between A and B ( which is equal to x=4 KM), but can not be given by statement 2, which says any integral distance greater than or equal to 10 Km.
Only by equation 1) x could be 2,9

As we have to take only integral part and no fraction part
how 9  ??

does x=9 satisfies equation $log_2$9 = $sqrt{9}$  ??      // (3.1699) != 3  right ??

See , x=4 and x=16 both holds the equation 1 .

So ans should be either A for x=4 or C for x=16.