A gulab jamun contains sugar syrup up to about 30% of volume,Find approximately how much syrup would be found in 45 gulab jamuns,each shaped like a cylinder with two hemispherical ends with length 5 cm and diameter 2.8 (see Fig.13.15)

A medicine capsule is in the shape of a cylinder with two hemispheres stuck to each of its ends(see Fig.13.10).The length of the entire capsules is 14mm and the diameter of the capsule is 5 mm.Find its surface area.

Rachel,an engineering student,was asked to make a model shaped like a cyclinder with two cones attached at its two ends by using a thin aluminium sheet.The diameter of the model is 3 cm and its length is 12cm.If each cone has a height of 2 cm,find the volume of air contained in the model that Rachel made.(Assume the outer and inner dimensions of the model to be nearly the same).