Q&A - PSLE Math
-
superksmum:
HiHi help needed!
A tank was half filled with water. More water was added until it was 2/3 full. The ratio of the mass of the tank when it was 1/2 full to the mass of the tank when it was 2/3 full was 7:9.
a) What is the ratio of the volume of water in the tank when it was 1/2 full to the volume of the water went he tank was 2/3 full?
b) the mass of the empty tank was 500g. What was the total mass of the tank and water when the tank was 2/3 full?
Where is this question from?
Perhaps some info needed for (b) might be missing.
The answer to (a) is 3:4
Divide the tank into 6 units
1/2 filled ----- 3 units
2/3 filled ----- 4 units.
Best wishes -
Hi moderators
Please delete.
Best wishes -
tianzhu:
Hi Tianzhu,
Hisuperksmum:
Hi help needed!
A tank was half filled with water. More water was added until it was 2/3 full. The ratio of the mass of the tank when it was 1/2 full to the mass of the tank when it was 2/3 full was 7:9.
a) What is the ratio of the volume of water in the tank when it was 1/2 full to the volume of the water went he tank was 2/3 full?
b) the mass of the empty tank was 500g. What was the total mass of the tank and water when the tank was 2/3 full?
Where is this question from?
Perhaps some info needed for (b) might be missing.
The answer to (a) is 3:4
Divide the tank into 6 units
1/2 filled ----- 3 units
2/3 filled ----- 4 units.
Best wishes
Thank you.
It is a worksheet by the school teacher for the kids to practice. -
Hi Tianzhu,
I have checked the paper. This is what is stated in the paper. -
tianzhu:
Sorry, it should be car z!Michaelia0816:
7)Car x, car y and car z together crossed point a at noon as they were heading for point b. by 1.30 pm, car x was 75 km from point a and car y was ahead of car x by 6km. By this time, car x had already travelled the combined distance of the other two cars from point a. What was the difference in speed between car z and y?
Hi
Please check.
Best wishes -
Oh the car question I already solved it!
-
Tianzhu help!
20) Peter set off from X for Z at 10.45 am at a uniform speed of 64km/h. 20 minutes later, Dave set off from Z for X at a uniform speed and he passed Peter at Y.
a) Find the speed at which Dave was travelling.
b) At what time would Dave arrived at X?
X. 96km Y. 140km Z
||_______| -
Sorry for the model I try to post on the pervious one.
It should be distance between XY is 96km and the distance between YZ is 140km!!! -
Help here also!
Ricky started driving at the same time as Mike from the city to a town 180 km away. The ratio of Ricky’s average speed to Mike’a average speed was 3:5. In all, Ricky took 1 h more to cover the whole distance than Mike.
a) How long did Ricky took to cover the distance?
b) What the speed at which Mike was driving? -
Also this one, help!
The ratio of the average speed of Ali, Ben and Carl was 2:3:4 respectively. They started driving at the same time and after 5h, they had covered a total of 675 km. What was the average speed of Ben?
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login