Question

13) Find the volume of hemi sphere. Its radius is r/2.
14) A match box majors 4cm X 2.5cm X 1.5cm. What
boxes?​

Answer 1

Answer:

13.Hemisphere Formulas in terms of radius r: Volume of a hemisphere: V = (2/3)πr. Circumference of the base of a hemisphere: C = 2πr. Curved surface area of a hemisphere (1 side, external only): A = 2πr. Calculate the base surface area of a hemisphere (a circle): B = πr. Total surface area of a hemisphere.

14.A matchbox measures 4 cm × 2.5 cm × 1.5 cm. What will be the volume of a packet containing 12 such boxes? ∴ Volume of a packet containing 12 such boxes = 15 x 12 cm3 = 180 cm3.