Find the value of a in the following equation, given that
b = 100 and c = 120:
1. a= b ÷ c
2. 2a = bc ÷ 2
3. a ÷ 2 = b ÷ c
4. a = c ÷ b
5. a = 3c ÷ b
Group 1:
An airplane flies 2640 km in 2 hours 45 minutes. What is its speed in kilometers per hour?
Group 5:
An airplane flies 1620 miles in 135 minutes. What is its speed in miles per hour?
Group 2:
A minibus drives 141 miles in 3 hours 55 minutes. What is its average speed in miles per hour?
Group 3:
A van moves 245 miles in 2 hours 55 minutes. What is its speed in miles per hour?
Group 4:
An airplane flies 304 km in 20 minutes. What is its speed in kilometers per hour?
Group 1:
Cindy rides her bike 3 km in 15 minutes. What is her speed in kilometers per hour?
Group 2:
David rides his bike 44 km in 2 hours 45 minutes. What is his speed in kilometers per hour?
Group 3:
Grace rides her horse 7 km in 42 minutes. What is her speed in kilometers per hour?
Group 4:
Emily rides her horse 6 km in 30 minutes. What is her speed in kilometers per hour?
Group 5:
Pete roller skates 40 km in 120 minutes. What is his speed in kilometers per hour?