Question 696964
When road repairs begin, the current speed limit will be cut by 40 km/h. It will then take at least 3.6 h to cover the same distance that can be covered in 2 h now. What is the speed limit now? 
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let=current speed limit
x-40=new speed limit
distance=travel time*speed
2x=3.6(x-40)
2x=3.6x-144
1.6x=144
x=90
current speed limit=90 km/hr