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Assuming the disc is uniform and isotropic (the same in different directions), the hole will expand in the same ratio as the metal. It is because the thermal expansion equation applies to all lengths associated with the metal, including the circumference of the hole, since the edge of the hole is made out of metal. And if the circumference of the hole expands, so does the diameter.
1240.04 – 360.18 + 449.98 ÷ 15.06 = ?
31.98% of 224.99 = 24.98% of ? + 9.91% of 499.99
? = 28.04² ÷ (4.01⁵ + 9.89 × 20.20) + 84.56% of (198.76 × 30.03)
(13.13 × 32.98) + 20.15% of 649.99 = ? + 122.34
(29.98% of 9840) + ? + (19.899% of 8490) = 7560
? + 163.99 – 103.01 = 24.01 × 6.98
A can complete a piece of work in 15 days. B is 30% more efficient than A. If they work together, how many days will it take to complete the work?
? * 4.89 = (410.15 ÷ 13.97) % of 6190 - 1342.77
22.22 × 8.99 + 142.15 = ?