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A flight from Delhi to Mumbai (1200 km) took off 30 minutes late. By flying 400 km/h faster than usual, it landed on time. What is the scheduled flight time?

Class 10Quadratic Word Problems: Work and PipesQuadratic Equations
  • A1 hour
  • B2 hours
  • C2.5 hours
  • D1.5 hours

Step-by-Step Solution

. Reject the negative root: usual speed 800 km/h, so the scheduled time is hours.
Answer: D) 1.5 hours

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