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Ncert ex-13.2 page no.248 question number …

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Ncert ex-13.2 page no.248 question number 3...

Posted by #?Abhishek...? . 5 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Prajnasree Behera 5 years, 3 months ago

It is known that the gulab jamuns are similar to a cylinder with two hemispherical ends. So, the total height of a gulab jamun = 5 cm. Diameter = 2.8 cm So, radius = 1.4 cm ∴ The height of the cylindrical part = 5 cm–(1.4+1.4) cm =2.2 cm Now, total volume of One Gulab Jamun = Volume of Cylinder + Volume of two hemispheres = πr2h+(4/3)πr3 = 4.312π+(10.976/3) π = 25.05 cm3 We know that the volume of sugar syrup = 30% of total volume So, volume of sugar syrup in 45 gulab jamuns = 45×30%(25.05 cm3) = 45×7.515 = 338.184 cm3

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