15x14. Nirvana's drum tech confirmed it.
15x14=210 square feet 210/9=23 1/3 square yards
15 x 14 = 210 square feet
213 lbs in total. 14 pounds per stone. 15x14=210 + 3 = 213
15x14 = 210lbs divide by 2.2 (1kg = 2.2lbs) = 95.45kg
This is a variation on the handshake problem which say if there are n people at a party and every one shakes hands with every other one, how many handshakes are there? It is well know that kisses in fact are cleaner than handshakes which to tend to pass diseases. So thanks for a cleaner version of this classic math problem! n(n-1)/2 is the formula for the number of handshakes OR kisses for n people at a party. If you case, 15x14/2 which is 15x7 or 105.