A solid aluminium ball, when quenched in a water bath maintained at 40 – McqOptions

MCQOPTIONS

1.	A solid aluminium ball, when quenched in a water bath maintained at 40 C, cools down from 550 C to 450 C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ C.
A.	370
B.	340
C.	320
D.	300
Answer» B. 340

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