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t h e space a n g l e space o f space e l e v a t i o n space o f space j e t space p l a n e space f r o m space a space p o i n t space t o space t h e space g r o u n d space i s space 60 space d e g r e e. space a f t e r space a space f l i g h t space o f space 15 space s e c comma space space t h e space a n g l e space o f space e l e v a t i o n space c h a n g e s space t o space 30 space d e g r e e colon i f space j e t space p l a n e space i s space f l y space a t space c o n s tan t space h e i g h t space o f space 1500 root index blank of 3 m space space comma space f i n d space t h e space s p e e d space o f space p l a n e end root space space space space space
Asked by regeliscus987 | 01 Jun, 2019, 01:59: PM
answered-by-expert Expert Answer
angle AOB equals 60 degree so space in increment AOB OB equals 1500 square root of 3 space end root cot space 60 equals 1500 angle AOB equals 30 degree so space in increment straight A apostrophe OB apostrophe OB apostrophe equals 1500 square root of 3 space end root cot space 30 equals 4500 BB apostrophe equals OB apostrophe minus OB equals 3000 Distance space equals space 3000 space straight m time space equals space 15 space straight s speed space equals 3000 divided by 15 space equals space 200 space straight m divided by straight s
Answered by Arun | 03 Jun, 2019, 01:54: PM

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CBSE 10 - Maths
Two pillars are standing on either side of a 80 m wide road. Height of one pillar is 20 m more than the height of the other pillar. From a point on the road between the pillars, the angle of elevation of the higher pillar is 60°, whereas that of the other pillar is 30°. Find the position of the point between the pillars and the height of each pillar. (Use √3 = 1-73)
Asked by swetalinasamantaray022 | 21 Mar, 2023, 04:15: PM
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CBSE 10 - Maths
On a warm and lazy Saturday, Rishi is watching a county maintenance crew mow the park across the street. He notices the mower takes 16 sec to pass through 60c of rotation from one end of the park to the other. If the corner of the park is 40 meter directly across the street from his house,  (i) How wide is the park?  (ii) How fast (in kmph) does the mower travel as it cuts the grass?
Asked by badakhsharda | 14 Apr, 2022, 08:57: AM
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CBSE 10 - Maths
The angle of elevation of the top of a tower from two points distant s and t from its foot are complementary. Prove that the height of the tower is √st.
Asked by naancysingh | 09 Apr, 2022, 07:07: PM
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CBSE 10 - Maths
a person standing on the bank of a river observes that the angle subtented by a tree on the opposite bank of 60 degree. when he retreates 20m from the bank he find the angle to be 30 degree . find the height of the tree and the bradth of the river
Asked by vy499292 | 23 Jan, 2022, 08:04: PM
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CBSE 10 - Maths
If two crows are sitting at a height of 15 m and 10 m on different trees vertically opposite to each other. They view a vaddi (an estable) on the ground at a angle of depression 45°and 60° respectively. They start at the same time and fly at the same speed along the shortest path to pick up the vadai.Which bird will succeed in it.?
Asked by urzashu7818 | 15 Jan, 2021, 12:52: PM
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CBSE 10 - Maths
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Asked by arindeep.singh | 02 Oct, 2020, 12:19: PM
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CBSE 10 - Maths
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Asked by arindeep.singh | 02 Oct, 2020, 12:19: PM
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CBSE 10 - Maths
the angle of elevation of a cloud from a point h metre above a lake is theta. the angle of depression of its reflection in the lake is 45 degree. Find the height of the cloud
Asked by arindeep.singh | 11 Sep, 2020, 02:41: PM
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CBSE 10 - Maths
a fire in the building Bis reported on telephone to two fire staitons P and Q, 20 km apart from each other on a straight road P observes that the fire is at an angle of 60 degree to the road and Q observes that it is at an angle of 45 degree to the road. What station should send its team and how much time will this team have to travel?
Asked by debeswar32 | 06 Aug, 2020, 10:55: AM
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CBSE 10 - Maths
from a point on the ground the angles of elevation of the bottom and top of a communication tower fixed on the top of a 20 meter high building a 45 degree and 60 degree respectivelyf.find the height of the tower.
Asked by ahmadaarif199 | 24 Jul, 2020, 02:58: PM
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