Pragati Vigyan Sanstha did coordinate the 21 st jun experiment in India. There was four place in India to do the experiment .National Bal bhawan was control room and PVS cordinate the Meerut,Bagpat,Yamunanagar and Bhuj . in bhuj whole day was cloud so they could not did this experiment.As result came bal bhawan circumference was 41648 km.Bagpat (44551.920341 km),Meerut (32143.79 km)and 4 th place Yamunanagar(26760.22 km ).the participent in delhi was 150,bagpat was 50, Meerut was 30 and yamunanagr was 10 participent. so total participent from india was 240 students .
en JUN 2011 New Delhi( National Bal Bhawan ) ?