Question: 8 2 . A solid aluminium ball, when quenched in a water bath maintained at 4 0 C , cools down from 5 5 0

82. A solid aluminium ball, when quenched in a water bath maintained at 40C, cools down from 550C to 450C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ C.
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