Question
Two cones X and Y of are melted together to form a
cylinder of height 48 m. The height of cones X and Y are in the ratio of 3:2 respectively and the radius of cone X is 5/6 of the radius of cone Y. The curved surface area of cylinder is 2112 cm 2 .Which of the following can be determined?I: Radius of cylinderII: Total surface area of cone XIII: Relation between radius and height of cone.Solution
Curved surface area of cylinder = 2112 cm 2
2 * 22/7 * R * 48 = 2112
R = 7 cm
Let height of cone X and Y are '3h' cm and '2h' cm respectively and radius of cone X and Y are '5r' cm and '6r' cm respectively.
1/3 * π [25r 2  *3h + 36r 2  *2h] = π*7*7*48
r 2 h = 48
I: Radius of cylinder = 7 cm
II: Total surface area of cone X cannot be determined.
III: Relation between radius and height of cone = r 2 h = 48 cm 3
Mahesh ranked 17th from the top and 31th from the bottom among those who passed an examination. 5 boys did not participate in the competition and 4 fail...
If 'B' is coded as '4' and 'BALL' is coded as '44', then how will 'BALLOON' be coded?
Five friends S, T, U, V and W having different height. U is taller than only one person. W is neither the tallest not shortest. There are two persons wh...
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
3480 : 59 :: 4623 : ?     Â
Four letter- clusters have been given, out of which three are alike in some manner, while one is different. Choose the odd one.
There are 38 persons in a row, in which A is 8th from the left and B is 12nd from the right side of the row. Find out no of people between A and B.
What can be the possible age of V?
Five persons N, P, R, U and Y have different weights. Only one person has more weight than Y. P is heavier than U but not the heaviest. Weight of second...
There are five persons Priya, Mohini, Chetna, Alka and Garima, who have different heights. Priya is taller than Garima but shorter than Alka. Chetna is ...
