Question
The decimal equivalent of $\frac {1}{20} $ upto three significant figures is
Decimal equivalent upto $3$ significant figures is $0.0500$
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| $A.$ Optical Fiber Communication | $P.$ Ultrasound |
| $B.$ Radar | $Q.$ Infrared Light |
| $C.$ Sonar | $R.$ Microwaves |
| $D.$ Mobile Phones | $S.$ Radio Waves |
From the options given below, find the most appropriate match between entries in the left and the right column