PSLETim pushes two rods, K and L, straight into the ground until the length of each rod that is above the ground is the same.
16 of K and
18 of L are in the ground. The length of K in the ground is 12 cm longer than the length of L in the ground. What is the total length of rods K and L?
Fraction of Rod K above ground
= 1 -
16 =
56 Fraction of Rod L above ground
= 1 -
18 =
78 Heights of Rods K and L above ground are the same.
56 K =
78 L
3542 K =
3540 L
Length of Rod K more than length of Rod L
= 42 u - 40 u
= 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Total length of Rods K and L
= 42 u + 40 u
= 82 u
= 82 x 6
= 492 cm
Answer(s): 492 cm