Question

From the top of a pole house A in a street, the angles of elevation and depression of the top and foot of house B on the opposite side of the street are 60° and 30°, respectively. If the height of pole house A is 21 m, then what is the height (in m) of house B? (correct to one decimal place)

Answer 1

Answer:

Well AKSHAYKUMARME2015 answer is given in the pic.

Orally 84m

Step-by-step explanation:

Answer 2

HEIGHT OF HOUSE = 63 + 21 =84 M

Step-by-step explanation:

<BCE = 30  

SO <DCE = 60

tan 60 = DE /DC

DC = 21 M

SO √3 = DE /DC

DE = 21 √3

NOE  DE = BC = 21 √3

tan <ACB  = AB/BC

SO tan 60 = AB/ 21√3

√3 = AB /21√3

SO AB = 21 * 3

AB = 63 M

SO HEIGHT OF HOUSE = 63 + 21 =84 M