For first 50 miles:-
x + 9 = 50 / t where x is average speed for the last 68 miles and t = time taken for the first 50 miles.
For the second 68 miles:-
x = 68 / (3 - t)
Substitute for x in first equation:-
68 / (3 - t) + 9 = 50/t
68t + 9t(3 - t) = 50(3 - t)
68t + 27t - 9t^2 = 150 - 50t
9t^2 - 145t + 150 = 0
t = 1.111 , 15 (ignore the 15 hours as total time = 3).
so the speed for the first 50 miles = 50 / 1.111 = 45 miles per hour Answer
Answer:
41.6666667
Step-by-step explanation:
divide 500 by 12
Answer:
7.4 x 10^4...............................
Answer:
60,000
Step-by-step explanation:
Let the total people in the household be 100%
If 80 percent of the households have cable television, 60 percent of the households have videocassette recorders and the number of households that have both cable television and videocassette recorders is 'x' percent. The number of households having ONLY cable television will be 80-x while households having ONLY videocassette will be 60-x.
To get x, we will have;
80-x + 60-x + x = 100
140-x = 100
x = 140-100
x = 40
This shows that 40% of the households have both cable television and videocassette.
If there are 150,000 households in the city, then the number of households that have both cable television and videocassette recorders could be 40% of 150,000
= 40/100 × 150,000
= 60,000
Number of households that owns both television and videocassette could be from 60,000.
Yards of the border is 22 yards.
Step-by-step explanation:
- Step 1: Find the perimeter of the room to find the yards of border to be used.
⇒ Perimeter = 2(length + breadth) = 2(6 + 5) = 22 yd
