A card board of 34 * 14 has to be attached to a wooden box and a total of 35 pins are to be used on the each side of the cardbox. Find the total number of pins used .
Pick.
A) 135
B) 136
C) 137
D) 138
E) 139

Rationale: ( 35 * 4 ) - 4 = 136 answer : b
Answer: B