Hot air at 50°C flows over a 15 cm long turbine blade, with velocity of 10 m/s. The same air flows over a 30 cm long turbine blade with velocity of 5 m/s. The average heat transfer coefficient for the first blade is 100 W/m2K. What is the average heat transfer coefficient for the second blade?

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Hot air at 50°C flows over a 15 cm long turbine blade, with velocity of 10 m/s. The same air flows over a 30 cm long turbine blade with velocity of 5 m/s. The average heat transfer coefficient for the first blade is 100 W/m<sup>2</sup>K. What is the average heat transfer coefficient for the second blade?