Seven persons, J, K, L, M, N, O and P sit in a linear row and face in north direction. Only two persons sit between P and J. M sits adjacent to L. Only one person sits between O and M. Only two persons sit between J and O. Only three persons sit between L and K. K doesn't sit immediate left of N. Who sits second to the left of N?
O L M J N K L
The curved surface area of a hemisphere is 72π cm2, then its radius is:
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