A coil of wire of cross-section 0.50 mm2 weighs 75g in air and 65g in water. The length of the coil in cm is
A 
B 
C 
D 
A coil of wire of cross-section 0.50 mm2 weighs 75g in air and 65g in water. The length of the coil in cm is
A
B
C
D