634×1313×22×?=30% of 520
A
13
B
13.5
C
12
D
None of these
Correct Answer: None of these
634×1313 + 22×? = 30%of 520⇒Let ? = x⇒274×403 + 4×x = 520×30100⇒108012 + 4x = 156⇒1080 + 48x = 1872⇒1080 + 48x = 1872.'.x = 1872 - 108048 = 16.5