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1. A bus can travel at 60 km/hr. How far can it travel in 3 hours?
A. 180 km C. 63 km
B. 57 km D. 20 km

2. Suppose that twenty men can build a house in 6 days which proportion can represent the number of men who can build the house in 4 days.
A. 20:6 = 6:4 C. n:6 = 20:4
B. 20:n = 6:4 D. n:20 = 6:4

3. Alice can type 320 words in 5 minutes. How many words can she type in 7 minutes?
A. 384 C. 572
B. 448 D. 576​