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D=√[a²+b²+c²]=√[6²+8²+24²]=√[36+64+576]=√676=26cm
b]
D=√[√47²+(4√3)²+7²]=√[47+48+49]=√144=12m
c]
D=a√3=5√3cm
d]
D=√12√3=√36=6m