Question
A solid right-circular cone is 11.2 cm high, and the
radius of its base is 2.8 cm. If the cone is melted and recast into a sphere, then what will be the diameter of the sphere?Solution
Let the radius of sphere be r. 
For cone, h = 11.2 cm, r' = 2.8 cm Now, the Volume of the cone = the volume of the sphere 
r³ = [(2.8)2 x (11.2)/4]  r³ = [(2.8)2 x 2.8]  r³ = (2.8)3  r = 2.8 cm The diameter is 2r = 2 x (2.8) = 5.6 cm
Seven boxes L, M, N, O, P, Q and R are kept one above another such that bottommost box is numbered as 1 while the topmost as 7. Box O is prime numbered...
Which of the following fruit is liked by E?
Find the odd set of numbers from the given alternatives?
How is S related to Q?
The number of books hold by W is?
How many boxes are kept above the box with White?
G, H, I, K, and L live on six different floors of the same building. The lowermost floor in the building is numbered 6, the floor above it is numbered 5...
Who is living on the floor numbered 3rd?
Five people are standing in a ticket booking line. G, I and J are standing together, J is between G and I. G is immediately behind H and K is immediatel...
Each of six teachers M, N, P, Q, S and I have their classes on six different days of a week starting from Monday and ending on Saturday of the same week...
Relevant for Exams:
