Let V, be the rate in still water and let C = rate river current
If the boat is going :
upstream, its rate is V-C and if going
downstream, its rate is V+C,
But V = 5C, then
Upstream Rate: 5C - C = 4 C
Downstream rate: 5C+C = 6C
Time = distance/Rate, (or time = distance/speed) , then:
Upstream time 12/4C and
Downstream time: 12/.6C
Upstream time +downstream time:= 2h30 ' then:
12/4C + 12/.6C = 2.5 hours
3/C + 2/C = 5/2 (2.5 h = 5/2)
Reduce to same denominator :
5C = 10 and Rate of the current = 2 mi/h
Should be true. The coffee would not stay the same temperature as it was originally than it would over time.
The answer is 24/5 or 4 2/5 they are the same thing
Answer:
54 students
Step-by-step explanation:
45% of 120 is 54
1a- 20
1b - 28
2a-5
2b-168
To work out the area of a triangle it is (base multiplied by height) divided by two.
