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# How many 7 d equal hr?

Updated: 9/21/2023

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Q: How many 7 d equal hr?
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### How far apart are two towns if you walk from one town to another at an average speed of 2.5 kmh and return at an average speed of 3 kmh and the time taken for the double journey was 7 hr 20 min?

Let the distance be d km time = speed/distance The journey to the second town took: t1 = d km &divide; 2.5 km/h = d/2.5 hr = 2d/5 hr The journey back to the first town took: t2 = d km &divide; 3 km/h = d/3 hr The total time is: t1 + t2 = 7 hr 20 min = 7 + 20/60 hr = 7&#8531; hr &rarr; 2d/5 + d/3 = 7&#8531; &rarr; (6d + 5d)/(3&times;5) = 7&#8531; &rarr; 11d = 7&#8531; &times; 15 &rarr; d = ((7&times;3+1)/3 &times; 15)/11 &rarr; d = (22/3 &times; 15)/11 &rarr; d = 22/11 &times; 15/3 &rarr; d = 2 &times; 5 = 10 The towns are 10 km apart. Checking: t1 = 10 km &divide; 2.5 km/h = 4 hr t2 = 10 km &divide; 3 km.h = 3&#8531; hr t = t1 + t2 = 4 hr + 3&#8531; hr = 7&#8531; hr 1 hr = 60 min &rarr; &#8531; hr = &#8531; &times; 60 min = 20 min &rarr; t = 7 hr 20 min.

### What does D- -7 equal?

D- -7 is the same as D+7 because - -7 = +7

### What is d over 12 plus 7 times d over 12 equal?

what is d over 12 plus 7 times d over 12 equal

### How many days equal 3 weeks?

let me break it down for you, 7 days (d) = 1 week (w) 7(d) =1(w) 7(d) X 3 =21(d) =3(w) Answer: 21 days to 3 weeks.

### How many mph to travel 7 miles in 5 minutes?

Basic formula: D=rt Solve for rate: r=D/t Time must be in hours; 5 min * 1 hr/60 min = .08333 hr r=7mi/.0833hr = 84 MPH (rounded) Alternative method: There are 12 x 5 min in an hour so 12 x 7 = 84 mph

### What is -6d equals 42 what does d equal?

If -6d = 42 then 6d = -42. then divide by 6, d = -7

### What is the circumference of a circle if it's diameter is 7 inches?

Circumference of a circle is equal to 2(pi)r with r being the radius, or (pi)d with d being the diameter. If we use (pi)d, with d being equal to 7 and (pi) being equal to 3.14159, we get that the circumference is 21.9911485751 inches. This can be rounded to 22 inches.3.14159 * 7in = 21.9911485751in

### How do you write a c program to convert time in sec to time?

main() { int sec=00,min=00,hr=00; printf("Enter time in seconds"); scanf("%d",&amp;sec); if (sec&lt;60) printf("%d :%d : %d",hr,min,sec); else if(sec&gt;=60) min=int(sec/60); sec=int(sec%60); printf("%d: %d : %d",hr,min,sec); else if (sec&gt;=3600) min=int(sec/60); sec=int(sec/60) hr=int(min/60); printf("%d : %d : %d",hr,sec,min); }

### How did you get 4 for 96 hr equals 4 d?

96 hr / 24 hr/day = 96/24 = 4 day

7

### Use the digit 4 four time to equal 7?

7 =(4+4)-(4/4) problem solved :D

### How many hours are there in 2 year?

Here are some unit conversions you'll need. 24 hours per day (24 hr/d) 365 days per year (365 d/yr) It's a straight multiplication. If you multiply years and hr/d and d/yr you'll be left with hours. Try it.