guys please someone solve question no 22
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❏ Question:-
The decorative solid trophy is made of two solids of shining glass as shown in figure given below . Find the cost of the glass for making the trophy , if one cubic centimetre of glass costs 4.
❏ Solution:-
✏ Given:-
• side of the cube = 28 cm.
• height of the cylinder = 28 cm.
• diameter of the cylinder = 28 cm.
✏ To Find:-
- Volume of the whole trophy
- cost of making the whole body(trophy).
✏ Explanation:-
➩ for the cube,
➩ for the cube,
∴ Volume of the Trophy is
∴ Cost of making the trophy at 4 Rs/cm³.
❏ Formula Used :-
For a Cube of Side a ,
Where, •T.S.A.=Total Surface area.
For a right circular cylinder of base radius r and
height h,
Where, •L.S.A.=Curved Surface area.
•T.S.A.=Total Surface Area.
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