The length of the side BC is

In the adjoining figure, ABC is a right triangle right angled at B. If AB = 10 cm and angle C = 30°, then the length of the side BC is

(a) 10/√3 cm

(b) 10√3 cm

(c) 20 cm

(d) 5 cm

Answer :

In the given 
Sum of all angles is 

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