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