PSLEAndy pushes two sticks, B and C, straight into the ground until the length of each stick that is above the ground is the same.
13 of B and
16 of C are in the ground. The length of B in the ground is 9 cm longer than the length of C in the ground. What is the total length of sticks B and C?
Fraction of Stick B above ground
= 1 -
13 =
23 Fraction of Stick C above ground
= 1 -
16 =
56 Heights of Sticks B and C above ground are the same.
23 B =
56 C
1015 B =
1012 C
Length of Stick B more than length of Stick C
= 15 u - 12 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Total length of Sticks B and C
= 15 u + 12 u
= 27 u
= 27 x 3
= 81 cm
Answer(s): 81 cm