India में कहा है तैरता हुआ Post-Office

Post OFfice Box

A cyclist goes to the post-office from his village at 12 km/h and reaches the post-office 15 minutes before 10 a.m. When he goes to the post-office from his village at 10 km/h, reaches the post-office 30 minutes after 10 a.m. Find the distance of the post-office from the village of the cyclist.