bonsoir ,
exercice 60:
1) ST/SQ = SU/SR = TU/RQ
ST/8 = 4/11 = 3/RQ
ST x 11 = 8 x 4
ST = 32 / 11
ST = 2,90
RQ x 4 = 11 x 3
RQ = 33 / 4
RQ = 8,25
2)
ST/SR SU/SQ = UT/RQ
ST/22,1 = 5/13 = 4,5/RQ
ST x 13 = 22,1 x 5
ST = 110,5 /13
ST = 8,5
RQ x 5 = 13 x 4,5
RQ = 58,5 / 5
RQ = 11,7