please help me solving this

Asked by deepakdorik | 2nd Oct, 2009, 10:33: PM

Expert Answer:

The end to end length is 5 cm, so the length of cylindrical portion is 5 - 2.8 = 2.2 cm.

Volume of one Gulab jamun = Volume of cylindrical portion + Volume of 2 hemispherical ends.

Volume of one Gulab jamun = Volume of cylindrical portion + Volume a sphere.

= πDL + πD3/6 = (22/7)(2.8)(2.2) + (22/7)(2.8)3/6 = 19.36 + 11.5 = 30.86 cm3

The sugar syrup in one Gulab jamun = (0.30)(30.86) cm3

The sugar syrup in 45 Gulab jamun = (45)(0.30)(30.86) = 416 cm3

The answer at the end of the CBSE Class X book is 338 cm3 and is incorrect.

Regards,

Team,

TopperLearning.

Answered by  | 3rd Oct, 2009, 01:07: PM

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