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Probability

Question

Wired Faculty App

Find the amount of water displaced by a solid spherical ball of diameter
28 cm

Solution

Diameter = 28 cm

therefore

Radius (r) =

28 over 2 space c m space equals space 14 space c m

therefore

Amount of water displaced =

4 over 3 πr cubed

equals 4 over 3 cross times 22 over 7 left parenthesis 14 right parenthesis cubed equals 34496 over 3 space cm cubed equals space 11498 2 over 3 space cm cubed

Some More Questions From Probability Chapter

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of र 7.50 per m².

A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.

(i) Which box has the greater lateral surface area and by how much?

A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.

(i) Which box has the greater lateral surface area and by how much?

A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high.

(i) What is the area of the glass?
(ii) How much of tape is needed for all the 12 edges?

Parveen wanted to make a temporary shelter for her car, by making a box-like structure with tarpaulin that covers all the four sides and the top of the car (with the front face as a flap which can be rolled up). Assuming that the stitching margins are very small, and therefore negligible, how much tarpaulin would be required to make the shelter of height 2.5 m, with base dimensions 4 m × 3 m?

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