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# maths watch

1. Help with this pls-

A journey took 1h 20 min at an average speed of 87 km/h. Find distance travelled.

thanks
2. t=Time in seconds (s) 1h 20 min = (1* 60* 60 ) + (20 * 60) =3600 + 1200=4800 s‎
V =Speed in meter per second (m/s)=87 * 1000/3600 = 24.17 m/s
3. just remember, distance / speed x time (set this out in a triangle) for these types of problems
4. Hi,

Can someone help me out with this maths problem, i have attached the document, all i need to find out is why are some answers negative. Thanks
Attached Files
5. print screen shot.doc (160.0 KB, 93 views)
6. 1 5 -10 7 -1.428571429
2 5 -20 4 -5
3 5 -30 1 -30

For the 1,2,3== (2b+2l-lb) is +ve
it could be the condition or the exception
7. but what is the condition?
8. (Original post by zee11)
but what is the condition?
The statement is true if and only if (2b+2l-lb) is negative ‎
(lb )bigger than 2(b+l)
9. u seem to know all the questions i struggle with!!!
thanks again

(Original post by sam1990sam)
The statement is true if and only if (2b+2l-lb) is negative ‎
(lb )bigger than 2(b+l)

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