sapkotarakshika111 sapkotarakshika111

01-09-2020
Mathematics

contestada

From the top of a tree 20 metres high,the angle of depression at a point on the opposite bank of a river is found to be 30° .Find the breadth of the river.

Respuesta :

itsabraham2004 itsabraham2004

01-09-2020

Answer:

17.3

Step-by-step explanation:

sin(30)=0.5

0.5*20=100

20*20+x*x=100

x=17.3

Answer Link

Otras preguntas

For light with a frequency of 5.371 x 10^14 s^-1, what is the energy (in J)?

A brick is thrown upward from the top of a building at an angle of 25.7° above the horizontal and with an initial speed of 15.1 m/s. The acceleration of gravity

One theme of Maya Angelou's poem "Still I Rise" is that adversity can be overcome, or at least countered, by an individual's strength of spirit. True False

Why did the English establish a colony on Roanoke ? To provide new markets and raw materials for England To provide slaves for labor in England’s other colonie

Why is it more difficult to lose excess body heat on a hot day? A. Because as air temperature gets closer to body temperature, heat transfer from the warmer bod

Let a = 0.9876 and b = 0.9887 with N = 2, calculate the midpoint.

Which one of the following is true concerning retinoblastoma protein and the transcription factor E2F? a. E2F phosphorylates Rb b. E2F binds phosphorylated Rb c

. The __________ is a set of recommended or best practices for organizations using payment cards.

Are the rational numbers closed under multiplication?

Question 11 (1 point) Which of the following planets exhibit the characteristic "back and forth" motion relative to the stars? O A) Mars OB) Jupiter OC) Saturn