Question

Try to solve My issue..​

Answer 1

Answer:

214.5cm

Step-by-step explanation:

Total suface area of toy = curved

surface area of cone + surface area of hemisphere

curved surface area of cone = πrl

where r = 3.5cm

height = 15.5-3.5=12cm

And hence, 1=12.5. by using formula ll

$l { }^ {2} = h {}^{2} + b {}^{2}$

Therefore C.S.A of cone = π(3.5)(12.5)=137.5cm

surface ara of hemisphere =

$2\pi \: r {2}^{2}$

$2 \times \pi \: \times (3.5) {}^{2}$

$77 \: cm {}^{2}$

Hence T.S.A of toy = 77+137.5=214.5cm