PSLESean pushes two sticks, L and M, straight into the ground until the length of each stick that is above the ground is the same.
13 of L and
16 of M are in the ground. The length of L in the ground is 9 cm longer than the length of M in the ground. What is the total length of sticks L and M?
Fraction of Stick L above ground
= 1 -
13 =
23 Fraction of Stick M above ground
= 1 -
16 =
56 Heights of Sticks L and M above ground are the same.
23 L =
56 M
1015 L =
1012 M
Length of Stick L more than length of Stick M
= 15 u - 12 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Total length of Sticks L and M
= 15 u + 12 u
= 27 u
= 27 x 3
= 81 cm
Answer(s): 81 cm