Question

As part of a screening process, computer chips must be operated in an oven at 145 °C. The starting temperature is 25 °C. After 15 minutes, the temperature is 85 °C. How many minutes will it take the oven to reach its specified operating temperature?

Answer 1

30 minutes will it take to reach its specified operating temperature from 25°C.

Explanation:

Initial Temperature of oven = 25°C

Time taken by oven to reach 85°C temperature = 15 minutes

We have to find time taken by oven to reach at temperature of 145°C

Increase in temperature in 15 minute = 85 - 25 = 60°C

So, Time take by oven to increase 60°C temperature = 15 min

Time take by oven to increase 1°C temperature =
`(15)/(60)=(1)/(4)\:minutes`

Temperature we have to increase = 145 - 25 = 120°C

Time take by oven to increase 120°C temperature =
`(1)/(4)*120=30\:minutes`

Therefore, 30 minutes will it take to reach its specified operating temperature from 25°C.