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An aeroplane takes 1 hour less for a ...

An aeroplane takes 1 hour less for a journey of 1200 km if its speed is increased by 100 km/hr from its usual speed. Find its usual speed.

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RD SHARMA-QUADRATIC EQUATIONS-All Questions
  1. A passenger train takes one hour less for a journey of 150 km if it...

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  2. The time taken by a person to cover 150 km was 2.5 hrs more than th...

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  3. An aeroplane takes 1 hour less for a journey of 1200 km if its spee...

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  4. A passenger train takes 2 hours less for a journey of 300 km if its...

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  5. A train covers a distance of 90 km at a uniform speed. Had the spee...

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  6. A train travels 360 km at a uniform speed. If the speed had been 5 ...

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  7. An express train takes 1 hour less than a passenger train to travel...

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  8. The sum of the ages of father and his son is 45 years . 5 years ago th...

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  9. Ashu is x years old while his mother Mrs Veena is x^2 years old. Fi...

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  10. The sum of the ages of a man and his son is 45 years. Five years ag...

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  11. The product of Shikha’s age five years ago and her age 8 years late...

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  12. The product of Ramu's age (in years) five years ago with his age (in ...

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  13. Determine their present ages. The sum of the ages of two friends is ...

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  14. The sum of the reciprocals of Rehmans ages, (in years) 3 years ago ...

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  15. Application of quadratic equation : The hypotenuse of a right angle tr...

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  16. The hypotenuse of a right triangle is 3sqrt(5) cm. If the smaller s...

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  17. Vikram wishes to fit three rods together in the shape of a right tr...

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  18. The hypotenuse of a right triangle is 25 cm. The difference between...

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  19. The hypotenuse of a right triangle is 3sqrt(10)c m . If the smaller...

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  20. A pole has to be erected at a point on the boundary of a circular park...

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