Question

A b 6 metre height pole and b service inclined at an angle of 60 degree to horizontal and reaches earth to the point of the board if ad is equal to 2.5 cm find the length of the ladder

Answer 1

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AD = 2.54 m   (given)
therefore, DB = 6 - 2.54 = 3.46 m

In triangle DBC,

sin 60 = BD/DC
root 3 / 2 = 3.46 / DC
therefore,      DC = 3.46*2 / root 3
                            = 3.46*2 / 1.73
                            = 4

therefore,   Length of ladder = 4m