A hot plate of 15 cm2 area maintained at 200 degree celsius is exposed to still air at 30 degree Celsius temperature. When the smaller side of the plate is held vertical, convective heat transfer rate is 15 per cent higher than bigger side of the plate is held vertical. Find size of the plate. The appropriate correlation for the convection coefficient isNu = 0.60 (Gr Pr) 0.25

A hot plate of 15 cm2 area maintained at 200 degree celsius is expose

1.	A hot plate of 15 cm2 area maintained at 200 degree celsius is exposed to still air at 30 degree Celsius temperature. When the smaller side of the plate is held vertical, convective heat transfer rate is 15 per cent higher than bigger side of the plate is held vertical. Find size of the plate. The appropriate correlation for the convection coefficient isNu = 0.60 (Gr Pr) 0.25
A.	l = 5.123 cm and b = 2.928 cm
B.	l = 6.123 cm and b = 3.928 cm
C.	l = 7.123 cm and b = 4.928 cm
D.	l = 8.123 cm and b = 5.928 cm
Answer» B. l = 6.123 cm and b = 3.928 cm

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