Determine the diameter of spherical casting, whose solidification time was found to be 75 min. Take solidification Factor to be 0.97 andtimes; 106 s/m2.a)220mmb)400 mmc)408 mmd)512 mmCorrect answer is option 'C'. Can you explain this answer?

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Determine the diameter of spherical casting, whose solidification time was found to be 75 min. Take solidification Factor to be 0.97 × 106 s/m².

a)
220mm
b)
400 mm
c)
408 mm
d)
512 mm

Correct answer is option 'C'. Can you explain this answer?

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Determine the diameter of spherical casting, whose solidification time...

Modulus of sphere = D/6 = VOLUME/SURFACE AREA

Solidification time = solidification factor × (modulus)²

75 × 60 = 0.97 × 106 × (D/6)²

D = 0.408 m = 408 mm

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Determine the diameter of spherical casting, whose solidification time was found to be 75 min. Take solidification Factor to be 0.97 × 106 s/m2.a)220mmb)400 mmc)408 mmd)512 mmCorrect answer is option 'C'. Can you explain this answer?

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