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* xp=AD+ oe, , / A= 30°., il yAPD: 4 ", PD, , tan 30° = AD, , 1 a, 3 AD or AD = 3y3 th, , inright APBD, Z B = 45°. So, BD = PD =3 m,, ABE BD + AD =3 + 3¥3 =3 (1+ V3) m,, , fore, the width of the river is 3 (v3 a im,, , EXERCISE 9,1, , ScifCus artist is climbing a 20 m long rope, which is, , htly stretched and tied from the top of a vertical A, , le to the ground. Find the height of the pole, if, , ue made by the rope with the ground level is han, (see Fig, 9. 1), , ee due to storm and the broken part ~, ing an ae aol of the tree touches theground = BO, , foot f ie . 30° with it. The distance between wig, ott, , Ches the ong tree to the point where the top ‘, , Sround is 8 m, Find the height of the, , ;. i . . For the children, cate plans to install two stides for the children 0 play 10 . atl m.and, ‘Be ofS years, she prefers to have a slide Whose top