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//Reactions developed in simply supported beam
//Refer fig. 3.46 (a)&(b)
//make assumptions as shown in fig. 3.46 (a)&(b)
//Taking moment about B
RA=((20*4*2)+((4*40*4)/(3*2)))/(6) //kN
RB=80+80-RA  //kN
printf("The reactions are:-\nRA=%.2f kN\nRB=%.2f kN",RA,RB)