Home
Class 7
MATHS
A certain freezing process requires that...

A certain freezing process requires that room temperature be lowered from `40^(@)C` at a rate of `5^(@)C` at every hour. Find the room temperature, 10 hours after the freezing process begins.

A

`10^(@)C`

B

`5^(@)C`

C

`-5^(@)C`

D

`-10^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • IMO MODEL TEST PAPER 2

    SCIENCE OLYMPIAD FOUNDATION |Exercise Achievers Section |5 Videos
  • IMO MODEL TEST PAPER 2

    SCIENCE OLYMPIAD FOUNDATION |Exercise Achievers Section |5 Videos
  • IMO MODEL TEST PAPER - 1

    SCIENCE OLYMPIAD FOUNDATION |Exercise Achievers Section|5 Videos
  • IMO QOESTION PAPER 2017-18 SET-B

    SCIENCE OLYMPIAD FOUNDATION |Exercise EVERYDAY MATHEMATICS |10 Videos

Similar Questions

Explore conceptually related problems

A certain freezing process requires that room temperature be lowered from 40^(@)C at the rate of 5^(@)C every hour.What will be the room temprature 10 hours after the process begins?

A certain freezing process requires that room temperature be lowered from 40^@ C at the rate of 5^@ C per hour. What will be the room temperature 12 hours after the process begins?

A certain freezing process requires that room temperature be lowered from 50°C at the rate of 4°C every hour. What will be the room temperature 18 hours after the process begins ?

6).A certain freezing process requires that room temperature be lowered from 40oC at the rate of 5oC every hour. What will be the room temperature 10 hours after the process begins? (7). In a class test containing 10 questions, 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted. (i) Mohan gets four correct and six incorrect answers. What is his score? (ii) Reshma gets five correct answers and five incorrect answers, what is her score? (iii) Heena gets two correct and five incorrect answers out of seven questions she attempts. What is her score?

Water at 100^(@) C cools in 10 minutes to 88^(@)C in a room temperature of 25^(@)C .Find the temperature of water after 20 minutes.

The temperature and the dew point in an open room are 20^(@)C and 10^(@)C .if the room temperature drops to 15^(@)C ,what will be the new dew point?

A metallic sphere cools from 50^(@)C to 40^(@)C in 300 seconds. If the room temperature is 20^(@)C then its temperature in next 5 minutes will be -

Critical temperature of CO _(2) is 31.2 ^(@)C. In summer, the room temperature is 40^(@)C, then

In the morning the temperature of Delhi was 29^(@)C .After 3 hours it was 4^(@) C warmer.What was the temperature at that time?

Most substances contract on freezing . However, water does not belong to this category. We know that water expands on freezing. Further , coefficient of volume expansion of water in the temperature range from 0^(@)C to 4^(@)C is negative and above 4^(@)C it is positive . This behaviour of water shapes the freezing of lakes as the atmospheric temperature goes down and it is still above 4^(@)C . If the atmospheric temperature is below 0^(@)C and ice begins to form at t = 0 , thickness of ice sheet formed up to a time 't' will be directly proprotional to