Ender:

cftan:

A passenger train travels at a speed of 72km/h. A man on the passenger train observes a goods train travelling at a speed of 54km/h in the opposite direction. If the goods train passes him in 8 seconds, find the length of the goods train.

If the trains are in opposing direction, to an observer on one of the train, the relative speed of the other train is the sum of the two train.

Relative speed = 72 +54 = 126 km/h

Length of goods train = 126 X 8/3600 = 0.28km or 280m.

:thankyou:

A passenger train travels at a speed of 72km/h. A man on the passenger train observes a goods train travelling at a speed of 54km/h in the opposite direction. If the goods train passes him in 8 seconds, find the length of the goods train.

Need help on this question.


The price of a sofa is $x. A man buys the sofa on hire purchase according to the following terms: a downpayment of 25% and the remaining to be paid in monthly installments over 30 months at a simple interest rate of 12% per annum. Given that his monthly instalment is $52, find the value of x.

CHS seems not to be very strict with hp usuage? Or is it all the same in other sec sch? DS said that most of his classmates stayed in classrooms over recess and played hp games.

Hi cfftan..


The school will schedule dental appointments for the boys during school holidays. If the boys can't make it for the scheduled appointment, they can make appointments to see the dentist on another day / at another time. The boys can also walk-in to see the dentist during school hours, if the clinic is open and the dentist is available.[/quote]

:thankyou:

iFirefly:

cftan:

Hi, is there any dental service provided in chs?

Yes, there is.

Will the boys be called for dental yearly check or must they make their own appointments? Thank you.

Hi, is there any dental service provided in chs?

A man travels from town A to town B at an average speed of 4km/h and from town B to town A at an average speed of 6km/h. If he takes 45minutes to complete the entire journey, find his total distance travelled.

The book ‘Longman 1001 MCQ’ is meant more for O level rather than lower sec?

jieheng:

insanePaPa:

Can someone help my ds on this?


The LCM of 6, 12 & n is 660. Find all possible values of n.

6 = 2 * 3

12=2² * 3

660 = 2² * 3 * 5 * 11

n must include 5 * 11

n = 5 * 11 = 55

n = 2 * 5 * 11 = 110

n = 2² * 5 * 11 = 220

n = 3 * 5 * 11 = 165

n = 2 * 3 * 5 * 11 = 330

n = 2² * 3 * 5 * 11 = 660

Can someone help to explain. Thanks.