Posted by **Santha** on Saturday, June 19, 2010 at 6:32pm.

I HAVE AN EXAM REVIEW QUESTION AND I REALLY NEED HELP.

An airplane has an air speed of 330km/h and is heading in a direction of N30E when it encounters a wind from the north. The resultant ground velocity has a direction of N40E. How long does it take for the plane to travel 960km.

- Calculus - URGENT EXAM -
**Reiny**, Saturday, June 19, 2010 at 7:57pm
Did you make a diagram?

My vector diagram has angles 10°, 30°, and 140° with the longest sides as 330.

so the side across the 30° represents the ground velocity of the plane, let it be x

By the sine law

x/sin30 = 330/sin140

x = 256.69

so the actual groundspeed is 269.69 km/h, then to go 960 km would take

960/269.69 hours or 3.74 hours

or 3 hours and 44 minutes and 23.5 seconds

## Answer this Question

## Related Questions

- CALCULUS EXAM REVIEW - Hi, my exam is tomorrow and I'm here with my girlfriend ...
- calculus - Multiple choice: An airplane flying due east at 539 mph in still air...
- Calculus - An airplane is heading due east with an airspeed of 220km/h when it ...
- Calculus - Find the area between the curve y=4/x and the x-axis from x=1 to x=e...
- Calculus Exam - My calculus exam is on friday. I was wondering if anyone had any...
- Science - I have a science exam tomorrow for 9 Space Science. I was wondering if...
- grade nine science - How are elements arranged in the periodic table? Its for my...
- statistics - On this semesters final exam, john scored 72 on his calculus exam ...
- statistics - On this semesters final exam, john scored 72 on his calculus exam ...
- Calculus grade 12 exam review PLEASE HELP ASAP !! - PLEASE HELP ME! Exam is in ...

More Related Questions