12∙(40-39)+2 A. 18 B. 14 C. 24 D. 30
2 answers:
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Let time be x distance be y
- 140x=y-(1)
- 290x=360-y-(2)
Put value in eq(2)
Put it in eq(1)
- d=1.2(140)=168m
Let time be x distance be y
Put value in eq(2)
Put it in eq(1)