Question

please let me know the answer of this friends..
just don't answer for points..​

Answer 1

Answer: 23.84%

Explanation: n= $\pi$p$r^{2}$/8Vl

.:. Δn/n x 100

= Δp/p x 100 + 4 x Δr/r x 100 + ΔV/V x 100 + Δl/l x 100

=0.5 /76 x 100 + 4 x 0.01 /0.28 x 100 + 0.1/1.2 x 100 + 0.1/18.2 x 100

= 0.66% + 14.29% + 8.33% + 0.55%

= 23.83%