The areas of the three adjacent faces of a rectangular box which meet in a point are known. The product of these areas is equal to

the volume of the box

twice the volume of the box

the square of the volume of the box

cube root of its volume

Correct Answer : C

The diagonal of a square field is 110 m. Its area is

The ratio in which the line segment joining P (3. –4) and Q(6, 7) is divided by x axis is

P (-4, b) and Q(2,b+2) are 2 points and the co-ordinates of the middle point of PQ are (-2,2) .The value of b is