PSLEFlynn pushes two poles, C and D, straight into the ground until the length of each pole that is above the ground is the same.
15 of C and
18 of D are in the ground. The length of C in the ground is 15 cm longer than the length of D in the ground. What is the total length of poles C and D?
Fraction of Pole C above ground
= 1 -
15 =
45 Fraction of Pole D above ground
= 1 -
18 =
78 Heights of Poles C and D above ground are the same.
45 C =
78 D
2835 C =
2832 D
Length of Pole C more than length of Pole D
= 35 u - 32 u
= 3 u
3 u = 15
1 u = 15 ÷ 3 = 5
Total length of Poles C and D
= 35 u + 32 u
= 67 u
= 67 x 5
= 335 cm
Answer(s): 335 cm