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13
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3
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3 Questions
0 Answers
0
439
2
+13
During a race Ali ran the first 300 metres in 2 mins 10 secs and the last 100 metres in 30 secs. What was his average speed in m/s?
During a race Ali ran the first 300 metres in 2 mins 10 secs and the last 100 metres in 30 secs. What was his average speed in m/s?
I need a little help with this. I think I know the answer but I'm not sure if its correct. Please help me out.
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Melody
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Jul 5, 2015
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1050
54
+13
I've got one last question for yah. I thought I knew the answer, but I didn't. Ok:
I've got one last question for yah. I thought I knew the answer, but I didn't. Ok:
y is directly proportional to x. When y = 20, x = 4
Calculate x when y = 80
rosala
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Jun 29, 2015
0
465
1
+13
The distance(D km) that sally cycles varies directly as her speed (S km/h). So D=kS. She cycles 16km at an average speed of 8km/h.
The distance(D km) that sally cycles varies directly as her speed (S km/h). So D=kS. She cycles 16km at an average speed of 8km/h.
a) Find a formula connecting D and S.
Ans= D= 2S (I think this is correct)
b) How far would she cycle
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Alan
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Jun 29, 2015