Question 11:
Susan drives at an average speed of 105 km/h from town F to town G.
The journey takes 3 hours.
Susan takes 30 minutes longer for her return journey from town G to town F. Calculate the average speed, in km/h, for the return journey.
Solution:
Distance from F to G = 105 km/h × 3 hours =315 km Average speed for return journey = distance travelled time taken = 315 km 3 1 2 hours = 90 km/h
Susan drives at an average speed of 105 km/h from town F to town G.
The journey takes 3 hours.
Susan takes 30 minutes longer for her return journey from town G to town F. Calculate the average speed, in km/h, for the return journey.
Solution:
Question 12:
Diagram below shows a trailer travelling from a factory to location P and location P to location Q. The trailer departs at 8.00 a.m.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture148.png)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture147-1.png)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture150.png)
(a) Based on the Table, calculate the total mass, in tonne, of the trailer and its load.
(b) The trailer arrived at location P at 10.00 a.m. and it stopped for 1½ hours to unload half of the concrete pipes. The trailer then continued its journey to location Q two times faster than its earlier speed. State the time, the trailer reached at location Q.
Solution:
(a)
(b)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture153-300x194.png)
Diagram below shows a trailer travelling from a factory to location P and location P to location Q. The trailer departs at 8.00 a.m.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture148.png)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture147-1.png)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture150.png)
(a) Based on the Table, calculate the total mass, in tonne, of the trailer and its load.
(b) The trailer arrived at location P at 10.00 a.m. and it stopped for 1½ hours to unload half of the concrete pipes. The trailer then continued its journey to location Q two times faster than its earlier speed. State the time, the trailer reached at location Q.
Solution:
(a)
(b)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/08/Picture153-300x194.png)