A cast Steel slab of dimension 30 20 5 cm is poured horizontally using a side riser. The riser is cylindrical in shape with diameter and height, both equal to D. The freezing ratio of the mould is

A cast Steel slab of dimension 30 20 5 cm is poured horizontally u

1.	A cast Steel slab of dimension 30 20 5 cm is poured horizontally using a side riser. The riser is cylindrical in shape with diameter and height, both equal to D. The freezing ratio of the mould is
A.	8D/75
B.	4D/75
C.	75/8D
D.	75/4D
Answer» B. 4D/75

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A cast Steel slab of dimension 30 20 5 cm is poured horizontally using a side riser. The riser is cylindrical in shape with diameter and height, both equal to D. The freezing ratio of the mould is

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