# Math

two helicopters flying at an altitude of 250 m are 2000m apart when they spot a life raft below. the raft is directly between the two helicopters. the angle of depression from one helicopter to the raft is 37 degrees. the angle of depression from the other helicopter is 49 degrees. both helicopters are flying 170 km/h. how long, to the nearest second, will it take the closer aircraft to reach the raft?

1. 👍 0
2. 👎 0
3. 👁 276
1. Sin49 = h/d1 = 250m/d1.
d1 = 250/Sin49 =331.3m = Distance of 1st helicopter.

Sin37 = h/d2 = 250/d2
d2 = 250/Sin37 = 415.4m = Distance of
2nd helicopter.

d1 = r*t, t = d1/r =0.3313km / 170km
= 0.00195h = 0.00195h * 3600s/h =
7 Seconds.

1. 👍 0
2. 👎 1
posted by Henry

## Similar Questions

1. ### Math

Two helicopters ﬂying at the same altitude are 2000m apart when they spot a life raft below. The raft is directly between the two helicopters. The angle of depression from one helicopter to the raft is 37° and the angle of

asked by Jesse on June 13, 2018
2. ### middle school

Two news helicopters are flying in the same altitude on the way to a political rally. Helicopter A is due 20 miles west of the rally. Helicopter B is 15 mies south and 15 miles each. How far apart is each helicopter? How far from

asked by Franklin on May 5, 2010
3. ### math

A helicopter is 400 miles directly north of Ghana and is flying at 20 miles per hour. A second helicopter is 300 miles east of Ghana and is flying west at 15 mph. What is the rate of change of the distance between the helicopters?

asked by Rachael on December 30, 2010
4. ### Physics

Calculate the ratio of the drag force on a jet flying at 1049 km/h at an altitude of 10.0 km to the drag force on a prop-driven transport flying at 560 km/h and at an altitude of 5.00 km. The density of air is 0.380 kg/m3 at 10.0

asked by Heidi on March 6, 2013
5. ### math

a plane is flying at an altitude of 23,760 feet. which expression can be used to find the altitude in miles

asked by HOSEBEE on February 19, 2020
1. ### English

1. Look at the structure in this picture. It is on the left side of the flagpole in the picture on/of page 163. This one is used for helicopters. Helicopters take off and land here. What is this place? It is a heliport. (Would you

asked by rfvv on November 17, 2016
2. ### math

If a plant if flying horizontaly at 400mph and drops a package that takes 1.6 sec to hit the ground. What altitude is it flying at in meters

asked by austin on January 25, 2016
3. ### Alaniz

An airplane is flying at an altitude of 4000 feet and descends at a rate of 200 ft./m determine whether the altitude is proportional to the number of minutes. Explain your reasoning?

asked by Zack on September 1, 2015
4. ### Statistics

3. The following table lists the frequency distribution for 60 rolls of a die. Outcome 1-spot 2-spot 3-spot 4-spot 5-spot 6-spot Frequency 7 12 8 15 11 7 Using the “Goodness of Fit” test at the 5% level of significance, test

asked by Gummy on April 6, 2013
5. ### Math.

A road starts at a college and goes due north for 2000m, it then goes 2000m on a bearing 040 degree and ends at a market. How far is the market from the college

asked by Joy on May 27, 2019

More Similar Questions