As we know that
<span>speed of an EM wave is 3x10^8
And also
Velocity =Frequency x Wavelength
so for wavelenht
Wavelength = Velocity/ Frequency
so
wavelength = 3 x 10^8 / 5 x 10^9
= 3/50 or 0.06m
hope it helps</span>
All number dived in it same vale are =1
70. 180-120=60, and 180-60+50=70
It's simple .....
just subtract R and C.....
so 50x+10-10x-275
= 40x-265
so the answer is B