30°F24. In the given figure AB, CD and EF are three towers. The angle

1.	30°F24. In the given figure AB, CD and EF are three towers. The angleof elevation of the top of thetower CD from the top of thetower AB is 60° and that from EFis 30°. BD = 2/3 m, CD: EF = 5:4and DF = 4 m. What is the heightof the tower AB ?(a) 6 m(b) 12 m(c) 7 m(d) none of the aboveB60° Pl 30°
Answer» correct answer is (c) 7m CD/EF=x+3/x+1=5/4=x=7

30°F24. In the given figure AB, CD and EF are three towers. The angleof elevation of the top of thetower CD from the top of thetower AB is 60° and that from EFis 30°. BD = 2/3 m, CD: EF = 5:4and DF = 4 m. What is the heightof the tower AB ?(a) 6 m(b) 12 m(c) 7 m(d) none of the aboveB60° Pl 30°

Answer»

correct answer is (c) 7m

CD/EF=x+3/x+1=5/4=x=7