Question

2. A ladder 15m long reaches a window which is 9 m above the ground on one side of a
street. Keeping its foot at the same point, the ladder is turned to other side of the street
to reach a window 12m high. Find the width of the street.
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Answer 1

Answer:

hope it was helpful............

Answer 2

In △ADC,
AD
2
+AC
2
=CD
2

9
2
+AC
2
=15
2

AC
2
=225−81
AC=12 m
In △BEC,
EC
2
=BC
2
+BE
2

15
2
=12
2
+BC
2

225−144=BC
2

BC=9 m
Width of the road = AC+BC = 12+9 = 21 m