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| 1. |
A body cools in 3 minutes from 90^° C-80^° C . The temperature reduces to 70^° C in next (if the temperature of surrounding is 20^° C) a-2.54 minutes b-2minutes c-6minutes d-3.54 minutes |
| Answer» A body cools in 3 minutes from 90^° C-80^° C . The temperature reduces to 70^° C in next (if the temperature of surrounding is 20^° C) a-2.54 minutes b-2minutes c-6minutes d-3.54 minutes | |