Question

A ladder 13m long reaches along a wall of height 5m. At what distance from the wall does its foot touch ?

Answer 1

Step-by-step explanation:

let the distance between wall and the foot is x

Assume it is and right angle triangle and use Pythagoras theorem

13^2=5^2+x^2

x^2 = 169-25

X^2=144

X=12

Answer 2

Answer:

the distance is 12m

Step-by-step explanation:

the ladder is being kept slant to reach the wall

let the distance be 'x'

the groud and the wall will be perpendicular

that is they form a right triangle

so on applying Pythagoras theorem,

we will get, 13^2 = x^2 + 5^2

that is 169 = x^2 + 25

therefore x^2 = 169 - 25

that is x^2 = 144

therefore x = ± 12

distance can never be negative so we take x = 12

therefore the distance is 12m