8/2/2019 POP QUIZ Directed Numbers

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POP QUIZ : DIRECTED NUMBERS

1. A submarine is at sea level. Take the distanceabove the sea level as positive and that below as

negative. If the submarine goes down at 2 m per

second, calculate the position of the submarine

after 12 seconds.

2. Jenn poured water into a container. Then sheput the container into a refrigerator to make ice.

After 5 hours, the temperature of the water in

the refrigerator was 0 C. If the temperature of

the water dropped further by 3 C every hour,

what was the temperature of the water or ice

after another 3 hours?

3. A car was travelling on a road towards the eastat a speed of 60 km per hour. It arrived at theclock tower at noon. (Take the clock tower as the

centre, the east of the clock tower as positive

and the west of the clock as negative).

What was the distance between the car and the

tower at 9 a.m.?

4. A submarine dived 3 m each minute. How deepcan the submarine dive after 5 minutes?

5. The temperature at a highland resort drops by 2C every hour. Find the total drop in

temperature after 4 hours.

6. The temperature of a cold storage room dropsconstantly by 28 C in 4 hours. Calculate the

drop in temperature each hour.

7. The water level in a reservoir decreases by 5 min 4 days. Find the average decrease in the water

level per day.

8. A fish is 1 m below the sea level. An eagle is 7 mabove the sea level vertically above the fish.

What is the shortest distance, in m, that the

eagle needs to fly in order to reach the fish?

9. Ramli draws a monthly salary of RM1500. Hegives RM777 to his wife and spends RM200 for

his daughters education. Personally he spends

RM520 monthly for living expenses. At the end

of the month, his wife returns RM77 to him.

Ramli saves the balance of his money in the

bank. Calculate the total amount that Ramli

saves in the bank at the end of the month?

10.The flow rate of a certain liquid is 50 cm3 perminute. How long does it take to fill up the tank

with a capacity of 10 000 cm3

with this liquid?

11.A car began its journey by travelling at 90 km perhour for two hours. Then it travelled at 110 km

per hour for another 30 minutes. After that it

stopped for 3 hours. It continued its journey for

another 4 hours at a speed of 80 km per hour.

Calculate the time taken and the distance

travelled by the car.

12.A chemical compound with an initialtemperature of 29 C was heated until its

temperature rose by 15 C. Then the compound

was put in a beaker. The temperature of the

compound decreased by 8 C when it was

cooled. Find the final temperature of the

chemical compound.

13. In a mathematics quiz, each correct answer isgiven +3 points and each wrong answer is given

-2 points. If Azlin gave 6 correct answers and 4

wrong answers, find the total score for Azlin.

14.A factory produces 595 litres of a particular softdrink. The plant engineer plans to pack the drink

in 2 litre bottles. How many bottles does the

plant engineer requires?

15.An accounting firm makes a profit of RM2000.53in the first week of June. During the second week

of June, it suffers a loss of RM1530.81. during

the third week, the firm makes a profit of

RM3299.58. what is the total profit or loss of the

firm for the three weeks of June?

16.A submarine is 10.2 m below sea level. It goesdown further 5.5 m and then moves up 3.3 m.

What is the position of the submarine in relation

to the sea level?

~ G O O D L U C K ~