A bike moves with a speed of 50 km/h for 30 minutes and then with a speed of 60 km/h for the next 30 minutes. The total distance covered by the bike is

Q. A body colls from

70^{o} C

60^{o} C

in 10 minutes when kept in air at

30^{o} C

. In the next ten minutes its temprature will fall

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Pasteurization is heating at

The correct option is B 60-700C for 30 minutesIn the classic pasteurization treatment of milk, the milk was exposed to a temperature of about 630C for 30 minutes. Most milk pasteurization today uses higher temperatures, at least 720C, but for only 15 seconds.

The correct option is B 60- $70^{0}$ C for 30 minutes
In the classic pasteurization treatment of milk, the milk was exposed to a temperature of about $63^{0}$ C for 30 minutes. Most milk pasteurization today uses higher temperatures, at least $72^{0}$ C, but for only 15 seconds.