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