Question

Joanna laid a plank of wood down to make a ramp so that she could

roll a wheelbarrow over a low wall in her garden. The wall is 1.5
meters tall, and the plank of wood touches the ground 2 meters from
the wall. How long is the wooden plank?
a 2 meters long
b 2.5 meters long
C 4.4 meters long
d 3 meters long

Answer 1

2.5m

Explanation:

Given

Height of wall = 1.5m(opposite)

Base of the wall = 2m(adjacent)

Required

Length of wooden plank

Using the Pythagorean theorem

L² = 2²+1.5²

L² = 4+2.25

L² = 6.25

L = √6.25

L = 2.5m

Hence the length of the plank is 2.5m