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

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 ?

Text Solution

Verified by Experts

Rate=`-5^0c/h`
Initial T=`40^0`
After 10 hours = 40-(5*10)=40-50=`-10^0C`.
Promotional Banner

Topper's Solved these Questions

  • INTEGERS

    NCERT|Exercise EXERCISE 1.4|7 Videos

  • FRACTIONS AND DECIMALS

    NCERT|Exercise EXERCISE 2.6|5 Videos

  • LINES AND ANGLES

    NCERT|Exercise SOLVED EXAMPLES|1 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 per hour. What will be the room temperature 12 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?

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 ?

Water is filled in a vessel which is kept in a room at a temperature of 20^(@)C . The temperature of the water is slowly increased. When the temperature of water is 40^(@)C , it loses heat at the rate of 10cal/s. What will be the rate of loss of heat when the temperature of water is 80^(@)C ?

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?

The count rate of a radioactive sample falls from 4.0xx10^6 s^(-1) to 1.0xx10^6 s^(-1) in 20 hours. What will be the count rate after 100 hours from beginning ?

Liquid is filled in a vessel which is kept in a room with temperature 20°C. When the temperature of the liquid is 80°C, then it loses heat at the rate of 60 cal/sec. What will be the rate of loss of heat when the temperature of the liquid is 40°C ?