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clear
//Given
m=9*10**-9// constant
q1=3*10**-9// charge q1
q2=3*10**-9// charge q2
q3=10**9// charge q3
r=0.2// side length of triangle
//Calculation
W=m*((q1*q3/r)+(q2*q3/r))// work done
//Result
printf("\n Workdone is %e J", W)
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