given.. M=10N^(1/2)................................eqn (1)
dM/dN=10.1/2.N^(-1/2)
or, dM=1/2(10.N^1/2)dN/N
dM=1/2(M)dN/N........................frm eqn (1)
dM/M=1/2.dN/N
put dN/N=1%.........................................frm d qs.
s, dM/M=.5%.......................Answer
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