Mr Bharat Bhushan is fond of bicycle. One day he rides his bike 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. Find his average speed (km/ph) for the entire trip approximately?

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Mr Bharat Bhushan is fond of bicycle. One day he rides his bike 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. Find his average speed (km/ph) for the entire trip approximately?