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saanvichauhanos6
Answer is 2 hours as 12*10 as 12 mile 10 mph
12*10 = 120
120 divided by 60
2 hours

Let no of hours be x

  • 10x≥12
  • 10x≥15

Combined inequality

  • 12≤10x≤15

Solve

  • 12/10≤x≤15/10
  • 1.2≤x≤1.5

Solution region

  • [1.2,1.5]

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