Question

surface area and volume exercise 13.4 first question answer please








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Answer 1

Answer:

Step-by-step explanation:

(i) We have :

r = radius of the sphere = 10.5 cm

Surface area =4πr2

                   =(4×227×10.5×10.5)cm2

                          =1386cm2

(ii) We have :

r = radius of the sphere = 5.6 cm

Surface area =4πr2 =(4×227×5.6×5.6)cm2

                                                                 =394.24cm2

(iii) We have :

r = radius of the sphere = 14 cm

Surface area =(4×227×14×14)cm2

                   =2464c