Question

15m long ladder reached a window 12m high from the ground on placing at wall at a distance 'a'.find the distance of the foot of the ladder from the wall ​

Answer 1

Answer:

13 cm

Step-by-step explanation:

because the triangle formed by ladder is a right angled triangle

assume a is x

so

144+×2=225

x2=81

×=9

Answer 2

Answer:

9m

Step-by-step explanation:

12^2 + x^2 = 15^2

144 + x^2 = 225

225-144=x^2

81 = x^2

x = 9