(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 \[({{h}_{1}}+{{h}_{2}})d\]
Correct Answer: A
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