What is the value of x in the figure shown below? C
4.9
D
31°
4
111°
B В
A
4.9​

Step-by-step explanation:

for missing angle of triangle ABC

let the missing angle be y

31+111+x=180(sum of interior angle of a triangle is 180 degree)

142+y=180

y=180-142

y=38 degree

x=y(being alternate angles)

x=38 degree

(a) the volume of the cone is 20/3 in3

hence, option a is correct.