dgn caranya ya.................

p1 = 3/4 meter
p2 = 2/5 meter
masing-masing berkurang = 1/8

panjang tali saat disambung
= (3/4 - 1/8) + (2/5 - 1/8)
= (30/40 - 5/40) + (16/40 - 5/40)
= 25/40 + 11/40
= 36/40
= 9/10 meter (D)