Answer:
B) 63°
Step-by-step explanation:
got it right on edge :)
B
63 Degrees
Edge 2020
42
78/16=
39/8=
19.5/4= 4.80805
144.2 cm
Length of the iron rod is 7.4cm
Radius is 3.1m
Therefore the surface area can be calculated as follows
= 2πrl
= 2×3.142×3.1×7.4
= 144.2 I'm
Hence the surface area is 144.2cm