19) Four pumps can empty a swimming pool in 3 hours. How many pumps are needed to empty the pool in half an hour?
20)Three buses can carry 120 students. How many buses are needed to carry 360 students?
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Answer:
1. 18 pumps
2. 9 buses
Step-by-step explanation:
Please correct me if im wrong
Question:
•19) Four pumps can empty a swimming pool in 3 Hours. How many pumps are needes to empty the pool in half an hour.
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Solution:
Given:
•4 Pumps can empty a swimming pool in 3 hours.
•Half an hour is 30 min.
•In 3 hours there 180 min.
Divide:
=180 ÷ 30
=6
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Answer:
6
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Question:
•20) Three Buses can carry 120 students. How many buses are needed to carry 360 students?
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Solution:
•Three buses can carry 120 students.
Mathematical Phrase: 3=120
•How many buses are needed to carry 360 students.
•We are gonna use the method of multiplication.
Multiply:
=120 x 3
=360
....................
=3 x 3
=9
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Answer:
9
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Hope it helped!
Brainliest please :)