Answer:
t = 1.9
Explanation:
Given
d = rt
Substitute d = 57 and r = 30 into the equation
57 = 30t ( divide both sides by 30 )
= t , that is
57 = 30 × t
t = 57/30
t = 19 × 3 / 10 × 3
t = 19/10
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= t , that is