Q&A - PSLE Math

[MathIzzzFun]

Cheerfuldad:

Hi,


Q. mei ing and Raja started on a 36km cycling trip at the same time. They cycled at the same speed fit the 12 mm. For the remaining 24km, Meiling cycled at a faster speed. She arrived at the finishing point 10 minutes before Raja who was 4km behind her. Raja did not change his speed throughout the trip and he completed the trip at 11 10.

A) At what time did the trip start?

B). What was Meiling's average speed for the remaining 24km of the trip in m/min?

TIA.

Hi

I supposed the 2nd sentence should be :\"They cycled at the same speed for the first 12 km\" ?

If it is, then:

Raju is 4km behind when Meiling reached the finishing point.
Time to cycle 4km = 10min, Raju's speed = 4km x 6 km/h = 24km/h
Time taken to cycle entire distance = 36/24 h = 1.5h
Start time = 1110 - 1.5h = 0940

For the last 24km, when Meiling reached finishing point, Raju was 4km behind ie Raju cycled only 20km,
Meiling's speed = 24/20 x 24km/h = 1.2 x 24 x 1000/60 m/min = 480m/min

cheers.

[tianzhu]

Belle2011:

In every minute, 3 times as much water flows out of tap A as tap B into 2 empty containers, X and Y. After 20 minutes, container X is 2/5 filled with water and the height of water level in container X is the same as that of container Y. Given that the base area of container X is 30cm x 25cm and that of container Y is 50cm x 45cm, how many litres of water can container X hold?

(ans is 56.25 litres)

Hi Belle2011

Good Morning.

Perhaps, there may be some missing information.

To get the given answer of 56.25 litres, one needs to have a height of 75cm.

Best wishes

[tianzhu]

Belle2011:

Thank-you, tianzhu.

Hi Belle2011

You're welcome.

Best wishes

[Cheerfuldad]

HI MathIzzzFun,


Thank you for your answer!

Regards

MathIzzzFun:

Cheerfuldad:

Hi,

Q. mei ing and Raja started on a 36km cycling trip at the same time. They cycled at the same speed fit the 12 mm. For the remaining 24km, Meiling cycled at a faster speed. She arrived at the finishing point 10 minutes before Raja who was 4km behind her. Raja did not change his speed throughout the trip and he completed the trip at 11 10.

A) At what time did the trip start?

B). What was Meiling's average speed for the remaining 24km of the trip in m/min?

TIA.

Hi

I supposed the 2nd sentence should be :\"They cycled at the same speed for the first 12 km\" ?

If it is, then:

Raju is 4km behind when Meiling reached the finishing point.
Time to cycle 4km = 10min, Raju's speed = 4km x 6 km/h = 24km/h
Time taken to cycle entire distance = 36/24 h = 1.5h
Start time = 1110 - 1.5h = 0940

For the last 24km, when Meiling reached finishing point, Raju was 4km behind ie Raju cycled only 20km,
Meiling's speed = 24/20 x 24km/h = 1.2 x 24 x 1000/60 m/min = 480m/min

cheers.

[Hifive]

Hi all


Need help with the following questions:

1. http://www.flickr.com/photos/62186744@N04/6028704702/

2. Tom bought a vase which he decides to sell. If he sells the vase at a discount of 20%, he makes a gain of $150. If he sells it at 45% discount, he loses $325. How much did Tom pay for his vase?

Thanks in advance!

[bobsg01]

Need your kind help for this question.


Thanks in advance.

http://i54.tinypic.com/2qtctci.jpg\">

[stary]

bobsg01:

Need your kind help for this question.


Thanks in advance.

http://i54.tinypic.com/2qtctci.jpg\">

The question was discussed earlier on. Cheerio!

[tianzhu]

Hifive:

2. Tom bought a vase which he decides to sell. If he sells the vase at a discount of 20%, he makes a gain of $150. If he sells it at 45% discount, he loses $325. How much did Tom pay for his vase?

Hi Hifive

Your second question is pretty similar to one question discussed in one of our earlier posts.

There are two scenarios in your question. (Terry in the old question and Tom in the new one)

The first one involves Terry selling at a discount of 20% from the usual price or marked price. In the second case, he sells at a discount of 45% from the usual price.

When the selling price of the vase is less than the usual price or marked price of the vase, a discount on the item is given.

The selling price of the vase in the two scenarios is different, only the usual price or marked price remains the same.

Best wishes.

http://farm4.static.flickr.com/3325/5817158092_59fee6a1d8_z.jpg
http://farm6.static.flickr.com/5064/5816591015_a98e4eb5a1_z.jpg

[stary]

Hifive:

Hi all


Need help with the following questions:

2. Tom bought a vase which he decides to sell. If he sells the vase at a discount of 20%, he makes a gain of $150. If he sells it at 45% discount, he loses $325. How much did Tom pay for his vase?

Thanks in advance!

25% -> $150 + $325 = $475
100% -> 4 x 475 = 950 x 2 = $1900
80% -> 1900 x 8/10 = $1520
Original -> $1520 - $150 = $1370

[MathIzzzFun]

Hifive:

Hi all


Need help with the following questions:

1. http://www.flickr.com/photos/62186744@N04/6028704702/

2. Tom bought a vase which he decides to sell. If he sells the vase at a discount of 20%, he makes a gain of $150. If he sells it at 45% discount, he loses $325. How much did Tom pay for his vase?

Thanks in advance!

Hi

Q1 is similar to this question posted by pensiveowl - http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=27&t=280&start=3800

cheers.