Quantitative Aptitude :: Time and Distance - Discussion

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Explanation:
as per the question (4 days per week one costs $7 )
So, total on fuel for week= 7*4=$28
and she expend on partking for week = $36
Total she expend per week = $(28+36) = $64
Per day by bus both side = 2*1.30= $2.60
Total cost 4 days of week = 4*2.60 = $10.40
So she save = ($64-$10.40) = $53.60