Question

solved this 4 problem​

Answer 1

Step-by-step explanation:

sa = 4πr^2

sa = 4*(22/7) * 7 *7

sa = 4*22*7

sa = 616 CM square

Answer 2

Answer:

1) to find : volume of cone

whose  radius, r = 1.5 cm

height = 5 cm

$volume of cone = \frac{1}{3}\pi r^{2}h \\\\(putting values)\\\\volume of cone= \frac{1}{3}*\pi *(1.5)^{2} * 5\\\\ = 3.75 \pi cm^{3}$

2)to find; volume of sphere

diameter = 6 cm ; radius, r = 3 cm

$volume of sphere = \frac{4}{3} \pi r^{3} \\\\= \frac{4}{3} * \pi *(3)^{3} \\\\= 36 \pi cm^{3}$                                                  

3) to find: TSA  of cylinder whose,

radius, r = 5 cm

height, h = 40 cm

$TSA of cylinder = 2\pi r(r+h)\\\\= 2*\pi *5(5+40)\\\\= 450 \pi cm^{2}$                        

4) to find: SA of sphere whose

radius, r = 7 cm

$SA of sphere = 4\pi r^{2} \\\\= 4*\frac{22}{7} * (7)^{2} \\\\= 4*\frac{22}{7} *7*7\\\\=616 cm^{2}$