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A mould having dimensions 100 mm × 90 mm × 20 mm is filled with molten metal through a gate with height h and C.S. area A, the mould filling time is t1 The height is now quadrupled and the cross-sectional area is halved. The corresponding filling time is t2. The ratio t2 /t1 is
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- 1/√2
- 1
- √2
- 2
Correct Option: C
| T1 = | = | ||
| flowrate | A√2gh |
| T2 = | ||
| A/2 × √2g × 4b |
| = 1 | |
| T2 |
