24.A large square region is paved with n
2 gray square tiles,each measuring sinches on a side.A border d inches wide surrounds each tile.The figure below shows the case for n=3.When n=24,the 576 gray tiles cover 64% of the area of the large square region.What is the ratio
for this larger value of n?( ?。?br />一個大的正方形區(qū)域用n
2個灰色的正方形瓷磚鋪設(shè),每塊瓷磚的邊長為s英寸。每塊瓷磚周圍有d英寸寬的邊框。下圖顯示了n=3的情況。當(dāng)n=24時,576塊灰色瓷磚覆蓋了大正方形區(qū)域的64%。對于這個較大的n值,
比率是多少?( ?。?/div>