Question

A ladder 15m long reaches a window which is 9m
above the ground on one side of the street keeping its
tood at the same point, the ladder is turned to the other side of the street to steach a
window 12m high the width of the street is
a) 27m (b) 2m (c)24m (d) 18m​

Answer 1

Answer:

9 square = 81

Step-by-step explanation:

Answer 2

★ Question :

A ladder 15m long reaches a window which is 9m above the ground on one side of the street keeping its fooot at the same point, the ladder is turned to the other side of the street to steach window 12m high the width of the street is?

★ Answer

In ΔDCE ;

using Pythagoras,

DE² = DC² +CE²

CE ² = DE²- DC²

CE ² = 225 -81. [ DE = 15 m and DC = 9 cm ]

CE = 12 m

Now ;

the ΔABE

using Pythagoras

AE² = AB² + BE²

BE² = AE² - AB²

BE² = 15² - 12²

BE² = 225-144

BE = 9 m

Hence, BC = BE + EC = 12 + 9 = 21 m

width of street = 21 m

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