Question
If 49 Γ 23 = 41, 26 Γ 47 = 23 and 64 Γ 99 = 42, then
57Γ 68 = ?Solution
49 Γ 23 β (4 Γ 9) + 2 + 3 = 36 + 5 = 41 26 Γ 47 β (2 Γ 6) + 4 + 7 = 12 + 11 = 23 64 Γ 99 β (6 Γ 4) + 9 + 9 = 24 + 18 = 42 57 Γ 68 β (5 Γ 7) + 6 + 8 = 35 + 14 = 49
The refractive index of water and turpentine oil are 1.33 and 1.47, respectively. A ray of light travels from
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