Answer :
LET ,
HEIGHT OF THE TOWER(CE)=30 M
HEIGHT OF THE BOY(AB)=1.5M
⇒CD=AB=1.5 M
⇒DE=CE-CD=30-1.5
=28.5
ANGLE OF ELEVATION
ANGLE EAD= 30 DEG ,ANGLEEFD=60 DEG
FROM,
TRIANGLE EAD,
TAN 30 =DE/AD
1/√3=28.5/X+Y
X+Y=28.5√3.........................EQ(1)
FROM,TRIANGLE EFD,
TAN 60=ED/FD
√3=28.5/Y
Y=28.5/√3
SUB Y =2S.5/√3 IN EQ(1)
X+28.5/√3=28.5√3
X=28.5√3-28.5/√3
X=28.5(√3-1/√3)
X=28.5×2/√3×√3/√3
X=(57×√3)√3
X=19×√3
X=19(1.732)
X=33.52
THEREFORE DISTANCE TRAVELLED BY BOY IS 33.908
HEIGHT OF THE TOWER(CE)=30 MHEIGHT OF THE BOY(AB)=1.5M⇒CD=AB=1.5 M⇒DE=CE-CD=30-1.5 =28.5ANGLE OF ELEVATIONANGLE EAD= 30 DEG ,ANGLEEFD=60 DEGFROM,TRIANGLE EAD,TAN 30 =DE/AD1/√3=28.5/X+YX+Y=28.5√3.........................EQ(1)FROM,TRIANGLE EFD,TAN 60=ED/FD√3=28.5/YY=28.5/√3SUB Y =2S.5/√3 IN EQ(1)X+28.5/√3=28.5√3X=28.5√3-28.5/√3X=28.5(√3-1/√3)X=28.5×2/√3×√3/√3X=(57×√3)√3X=19×√3X=19(1.732)X=33.52THEREFORE DISTANCE TRAVELLED BY BOY IS 33.908