CBSE /Class 9
Maths MCQ Based On Surface area and volume surface area and volume of cone
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CBSE Class 9 Maths Surface area and volume surface area and volume of cone
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In order to find the cloth needed to make the conical tent we need to find its curved surface area as the base of the tent is open .
As the cone is made of a sector shaped metallic sheet so the length of the arc of the given metallic sheet will lie along the circumference of the cone so formed.
As the plastic funnel was cut along its slant height so in order to find the radius of the sector so formed we need to find the slant height of the cone .
Find the internal curved surface area of the conical as well as the cylindrical potion so that we can find the cost of whitewashing the structure .
Do you remember that the volume of a given cone with same height and base radius is 1/3 of that of the volume of cylinder .
First of all find the radius of the given cone by relating the given values to that of unknown , then find the curved surface area .
We can find the value of radius of the given cone by relating it to that of its circumference and then we can further find the volume using the formula.
Just find the slant height first and then go on to find the curved surface area .
First of all find the radius of the given cone and then put the known values into the formula to work out the volume of the given funnel .
By relating the given volume of the conical vessal to that of the other unknown quantities we can find out the diameter by using inverse operations .
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