Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The angle of elevation of a jet fighter from a point A on the ground is 600. After a flight of 15 seconds, the angle of elevation changes to 300. If the jet is flying at a speed of 720 km/hr, find the constant height at which the jet is flying.(Use √3 =1.732 (Ans: 2598m)
Ans: 36 km / hr = 10m / sec
720 km / h = 10 x 720/36
Speed = 200 m/s
Distance of jet from
AE = speed x time
= 200 x 15
= 3000 m
tan 60o = AC/BC (opposite side/adjacentside)
√3 = AC/ BC
BC √3 = AC
AC = ED (constant height)
∴ BC √3 = ED ...................1
tan 30o = ED /BC + CD (opposite side/adjacentside)
1/√3 = ED/ BC + 3000
BC + 3000/√3 =ED
BC + 3000/√3 =BC√3 (from equation 1)
BC + 3000 = 3BC
3BC - BC = 3000
2 BC = 3000
BC = 3000/2
BC = 1500 m
ED = BC √3 (from equation 1)
= 1500 √3
= 1500 x 1.732
ED = 2598m
∴ The height of the jet fighter is 2598m.
Let R be the relation on S = {1, 3, 6, 9, 27} defined by aRb iff a|b. (a) Write down the matrix of R. (b) Draw the digraph of R. (c) Explain whether R is reflexive, irrere
In the earlier section we looked at first order differential equations. In this section we will move on to second order differential equations. Just as we did in the previous secti
Martha has $20 to spend and would like to buy as several calculators as possible along with the money. The calculators that she needs to buy are $4.50 each. How much money will she
a figure is made of a rectangle and an isosceles right triangle. the rectangle has sides of 6 in. and 3 in. one of the short sides of the rectangle is also one of the legs of the r
Binomial Mathematical Properties 1. The expected or mean value = n × p = np Whereas; n = Sample Size p = Probability of success 2. The variance = npq Whereas; q =
|a.x|=1 where x = i-2j+2k then calculate a
How do I reverse calculate taxes?
Keith wants to know the surface area of a basketball. Which formula will he use? The surface area of a sphere is four times π times the radius squared.
41x + 53y = 135, 53x +41y =147 Ans: 41x + 53 y = 135, 53 x + 41 y = 147 Add the two equations : Solve it, to get ... x + y = 3 -------(1) Subtract : Solve it , to
in 1970 a record 1.5 of rain fell in one minute at Basse Terre, guadaloupe in the caribbnean.at this rate, how much rain fell in 3 seconds or 0.05 of a minutes?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd