PSLEIvan pushes two poles, M and N, straight into the ground until the length of each pole that is above the ground is the same.
16 of M and
19 of N are in the ground. The length of M in the ground is 18 cm longer than the length of N in the ground. What is the total length of poles M and N?
Fraction of Pole M above ground
= 1 -
16 =
56 Fraction of Pole N above ground
= 1 -
19 =
89 Heights of Poles M and N above ground are the same.
56 M =
89 N
4048 M =
4045 N
Length of Pole M more than length of Pole N
= 48 u - 45 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Total length of Poles M and N
= 48 u + 45 u
= 93 u
= 93 x 6
= 558 cm
Answer(s): 558 cm