question_answer

Fill in the blanks.

(i)  The perimeter of a rectangle becomes ____ times its original perimeter, if its length and breadth are doubled.

(ii) The curved surface area of a cylinder is reduced by ____ percent if the height is half of the original height.

(iii) Opposite faces of a cuboid are ____ in area.

(iv) If the diagonal d of a quadrilateral is doubled and the heights \[{{h}_{1}}\] and \[{{h}_{2}}\] falling on dare halved, then the new area of quadrilateral is

A)

(i)	(ii)	(iii)	(iv)
2	50	equal	\[\frac{1}{2}({{h}_{1}}+{{h}_{2}})d\]

               

B)

(i)	(ii)	(iii)	(iv)
2	35	unequal	\[\frac{1}{2}({{h}_{1}}+{{h}_{2}})d\]

               

C)

(i)	(ii)	(iii)	(iv)
3	40	equal	\[({{h}_{1}}+{{h}_{2}})d\]

               

D)

(i)	(ii)	(iii)	(iv)
3	35	unequal	\[({{h}_{1}}+{{h}_{2}})d\]