Question

A ladder 15 metres long just reaches the top of a
vertical wall. If the ladder makes an angle of 60" with
the wall, find the height of the wall.
(NCERT Exemplar)​

Answer 1

Answer:

7.5

Step-by-step explanation:

let height of the wall be x

SO,

cos 60°=x/15

1/2=x/15

15=2x

x=15/2

x=7.5

Answer 2

Answer:

5×1.732

Step-by-step explanation:

tan 60= 15/x

$\sqrt{3} = 15 \div x$

$1 \div \sqrt{3} = x \div 15$

$x = 15 \times \sqrt{3} ) \div 3$

$x = 5 \times 1.732$

Thanks for Question..

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5×1.732...