Question

Q3. A plane is flying 5000 m above the sea level. At a particular point it is exactly above
submarine floating 1200m below the sea level. What is the vertical distance between them.
Q4. A certain freezing process requires the room temperature be lowered from 35°C at the
rate of 7°C every hour. What will be the temperature at the end of 10th hour. U
Q5. In a quiz +4 marks are awarded for every correct question and -2 marks are awarded
for every wrong answer. If a boy scores 38 marks if he got 12 correct questions. Find the
total number of questions.​

Answer 1

Answer:

6200m

Step-by-step explanation:

in the above question it is given that a plane is flying 5000m above sea level and a submarine is floating 1200m below sea level

so the vertical distance between the plane and the submarine is

5000+1200

=6200m

Step-by-step explanation:

Initial Temperature = 40° C

Rate of change in temperature = 5°C/hour

Time = 10 hours

So, in 10 hours the temperature would be decreased by 10*5 = 50°C.

So, Final Temperature = 40 - 50 = - 10°C.

Step-by-step explanation:

No. of correct answers=12

No. of marks=38

Hence, marks awarded for correct answers=12*4=48

But the boy got -10 marks

Hence, no. of wrong answers= -10/-2=5

Total no. of questions = 12+5=17