Q17: Jason left Town A at 1 p.m. travelling at 64 km/h towards Town B. Half an hour later, Ben left Town A, travelling at 80 km/h towards Town B. (a) How far ahead was Jason when Ben left Town A? (b) At what time would Ben be 8 km ahead of Jason? [4-mark][Answer given: 32 km, 4.00 pm
64 x 1/2 = 32 km
a) It was 32 km.
8 + 32 = 40 km
80 - 64 = 16 km/h
16 km --> 1 h
40 km --> 40/16 x 1 = 2 1/2 h
1/2 h 1 1/2 h
|--------------|--------------------------------|
1 pm 1.30 pm 4 pm
b) It was 4 pm.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment