Gotcha

3 Questions
0 Answers

0

1089

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. read more ..

Gotcha Jul 5, 2015

0

2054

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 ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●

Gotcha Jun 29, 2015

0

1119

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 read more ..

Gotcha Jun 29, 2015