Question

a manufacturer involved children in colouring playing top which is shaped like a cone surmounted by a hemisphere the entire top is 5 cm in height and the diameter of the top is 3.5cm find the area they have to paint if 100 playing tops were given to them​

Answer 1

Answer:

for cone r= 1.75

l = ___________

/ r2 + h2

_____________

/ 1.75)2 + 5)2

_______________

/3.06 + 25

= 5.29 cm

csa of cone = _ r l

^

22/7×1.75×5.29. = 29.09cm2

for hemisphere = 2_ r2

^

2×22/7×1.75)2

=19.25 cm2

area of top = csa of hemisphere + csa of cone

= 29.09 +19.25

=48.34cm2

for painting the 100 top = 48.34 ×100

4834cm2