Answer:
40 mph
Step-by-step explanation:
We assume "outbound" refers to the trip <em>to the lake</em>. The ratio of speeds is inversely proportional to the ratio of times, so ...
outbound speed : inbound speed = 4 : 3
These differ by one ratio unit, so that one ratio unit corresponds to the speed difference of 10 mph. Then the 4 ratio units of outbound speed will correspond to ...
4×10 mph = 40 mph
Paul's average speed on the outbound trip was 40 mph.
___
The distance to the lake was 120 mi.
Answer:
A
Step-by-step explanation:
<------------------------------>
3 7
We are given to check
whether these numbers are proportional
we know that any set of numbers are proportional when their ratios are equal
so, firstly we will ratios
First set of numbers:
We are given first set of numbers as 15 , 20 and 30
so, it's ratio is
now, we can simplify it
Since, common factor is 5
so, we can cancel 5
and we get
Second set of numbers:
We are given first set of numbers as 24 , 32 and 48
so, it's ratio is
now, we can simplify it
Since, common factor is 8
so, we can cancel 8
and we get
We can see that both sets of numbers are having same ratios
so, they are proportional.........Answer