5. In a hotel, food is stored in a freezer at -20 °C.
(1) What would be the temperature if it was raised by 5°C?
(11) Wh

2 thoughts on “5. In a hotel, food is stored in a freezer at -20 °C.<br />(1) What would be the temperature if it was raised by 5°C?<br />(11) Wh”

1. Step-by-step explanation:

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2. [tex]\boxed {\underline {\mathbb {PROPER\:QUESTION:-}}}[/tex]

   In a hotel, food is stored in a freezer at -20 °C,

   (1) What would be the temperature if it was raised by 5 °C?

   (2) What would be the temperature if it was lowered by 0.5 °C every hour for 12 hours?​

   [tex]\boxed {\underline {\mathbb {FINAL\:ANSWER:-}}}[/tex]

   (1) [tex]\boxed{-15C}[/tex]

   (2) [tex]\boxed{-26C}[/tex]

   [tex]\boxed {\underline {\mathbb {GIVEN:-}}}[/tex]

   food is stored in a freezer at -20 °C

   (1) temperature if it was raised by 5 °C

   (2) the temperature if it was lowered by 0.5 °C every hour for 12 hours

   [tex]\boxed {\underline {\mathbb {TO\:FIND:-}}}[/tex]

   • What would be the temperature if it was raised by 5 °C?
   • What would be the temperature if it was lowered by 0.5 °C every hour for 12 hours?​

   [tex]\boxed {\underline {\mathbb {SOLUTION:-}}}[/tex]

   Food is stored at -20°C

   Situation of 1 part :-

   It’s said that temperature is raised by 5°C [tex]\implies {+5 \: C}[/tex] [ ← increased i.e. we have taken as +5°C]

   Temperature when raised [tex]= -20+5\\[/tex]

   [tex]\boxed {\implies {-15 C}}[/tex]

   Situation of 2 part:-

   Current temperature [tex]= -20[/tex]°C

   Temperature lowered per hour [tex]= -0.5[/tex]°C [← lowered i.e. we have taken as -5°C]

   Hence temperature lowered in 12 hour [tex]= -0.5 \times 12 \\[/tex] [tex]=-6[/tex]°C

   Temperature after 12 hours [tex]= -20 -6[/tex]

   [tex]\boxed {\implies{-26C}}[/tex]

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