Question

A 15 metre long ladder reached a window 12 metre high from the ground on placing it against a wall at a distance 'a'. The value of 'a' is ------- Metre. *
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Answer 1

Answer:

here the hypotenuse is 15 m and height is 12 m

we have to find the base distance which is given as 'a'

so hypotenuse^2= base^2+ height^2

15^2=a^2+12^2

a^2=225-144

a^2=81

a=√81

a=9