PSLEJenson pushes two sticks, D and E, straight into the ground until the length of each stick that is above the ground is the same.
13 of D and
17 of E are in the ground. The length of D in the ground is 6 cm longer than the length of E in the ground. What is the total length of sticks D and E?
Fraction of Stick D above ground
= 1 -
13 =
23 Fraction of Stick E above ground
= 1 -
17 =
67 Heights of Sticks D and E above ground are the same.
23 D =
67 E
69 D =
67 E
Length of Stick D more than length of Stick E
= 9 u - 7 u
= 2 u
2 u = 6
1 u = 6 ÷ 2 = 3
Total length of Sticks D and E
= 9 u + 7 u
= 16 u
= 16 x 3
= 48 cm
Answer(s): 48 cm