Calculate the ratio factor and miller indices from this table and hence determine the unit cell dimension.

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20 20 Sin e Sin 0 Ratio Ratio H K factor 12.5 6.248 0.10 0.01 1 20.3 10.133 0.18 0.03 3 23.7 11.865 0.20 0.04 4 17.6 15.580 0.30 0.07 7 31.2 18.568 0.32 0.10 10 37.1 20.219 0.35 0.11 11 40.4 21.148 0.36 0.13 13 42.3 22.632 0.38 0.14 14 45.3 23.462 0.40 0.15 15 53.6 26.818 0.50 0.20 20 20 20 Sin e Sin 0 Ratio Ratio H K factor 12.5 6.248 0.10 0.01 1 20.3 10.133 0.18 0.03 3 23.7 11.865 0.20 0.04 4 17.6 15.580 0.30 0.07 7 31.2 18.568 0.32 0.10 10 37.1 20.219 0.35 0.11 11 40.4 21.148 0.36 0.13 13 42.3 22.632 0.38 0.14 14 45.3 23.462 0.40 0.15 15 53.6 26.818 0.50 0.20 20