PSLEGlen pushes two rods, A and B, straight into the ground until the length of each rod that is above the ground is the same.
13 of A and
17 of B are in the ground. The length of A in the ground is 6 cm longer than the length of B in the ground. What is the total length of rods A and B?
Fraction of Rod A above ground
= 1 -
13 =
23 Fraction of Rod B above ground
= 1 -
17 =
67 Heights of Rods A and B above ground are the same.
23 A =
67 B
69 A =
67 B
Length of Rod A more than length of Rod B
= 9 u - 7 u
= 2 u
2 u = 6
1 u = 6 ÷ 2 = 3
Total length of Rods A and B
= 9 u + 7 u
= 16 u
= 16 x 3
= 48 cm
Answer(s): 48 cm