The flight speed of a crow is 50 km / h which is 5/9 of the flight speed of a duck and the flight speed of a duck is 5/7

The flight speed of a crow is 50 km / h which is 5/9 of the flight speed of a duck and the flight speed of a duck is 5/7 of the flight speed of a seagull find the flight speed of a seagull.

If the speed at which the crow flies is 5/9 of the speed of the duck, then the speed at which the duck flies is:
50 × 9/5 = 90 kilometers per hour.
Since a duck flies at a speed of 90 kilometers per hour, which is 5/7 the speed of a seagull, the speed at which a seagull flies is:
90 × 7/5 = 126 kilometers per hour.
Answer: a seagull flies at a speed of 126 kilometers per hour.