. A certain freezing process requires that room temperature be lowered from 32°C
at the rate of 5°C every hour. What will be the room temperature 8 hours after the
freezing process begins?
. In a class test containing 10 questions, 5 marks are awarded for every correct
answer and 2 marks are deducted for every incorrect answer and 0 for questions
not attempted.
(i) Rohit gets four correct and six incorrect answers. What is his score?
(ii) Seema gets 5 correct and 5 incorrect answers. What is her score?
(iii) Ritu attempted 7 questions and gets only 2 correct answers. What is
score?
(i) Find a pair of integers whose product is -15 and whose difference is 8.
(ii) Find a pair of integers whose product is -36 and whose difference is 15.
Answers
Step-by-step explanation:
Given temperature is 40° C
Given temperature is 40° CIt is also given that the room temperature lowers at the rate of 5° C
Given temperature is 40° CIt is also given that the room temperature lowers at the rate of 5° CAfter one hour the temperature becomes (40 – 5) = 35° C
Given temperature is 40° CIt is also given that the room temperature lowers at the rate of 5° CAfter one hour the temperature becomes (40 – 5) = 35° CAfter two hours the temperature becomes (35 – 5) = 30° C
Given temperature is 40° CIt is also given that the room temperature lowers at the rate of 5° CAfter one hour the temperature becomes (40 – 5) = 35° CAfter two hours the temperature becomes (35 – 5) = 30° CHence after 10 hours the temperature becomes (-10° C)