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18 Jan 2022, 10:52
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
99% (00:29) correct
1%
(03:24)
wrong
based on 120
sessions
History
Date
Time
Result
Not Attempted Yet
If Shelly can write 45 lines in 5 minutes, how long will it take her to write 180 lines at the same rate?
A. 15 minutes
B. 20 minutes
C. 25 minutes
D. 30 minutes
E. 40 minutes
A. 15 minutes
B. 20 minutes
C. 25 minutes
D. 30 minutes
E. 40 minutes
yashikaaggarwal
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18 Jan 2022, 13:22
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45 lines = 5 minutes
180 lines = X minutes
Using cross multiplication,
X = 5*180/45
X = 20
Answer is B
Posted from my mobile device
180 lines = X minutes
Using cross multiplication,
X = 5*180/45
X = 20
Answer is B
Posted from my mobile device
19 Jan 2022, 11:43
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Here is the OE
Step 1: Understand Question Statement
• Shelly can write 45 lines in 5 minutes.
• We need to find the time taken to write 180 lines.
Step 2: Define Methodology
• We need to find her rate of writing per minute and from there we can find the time taken to write 180 lines.
[img]see%20attached%20img.%20file[/img]
Step 3: Calculate the final answer
Alternate Method (Using Unitary Method)
Shelly can write 45 lines in 5 mins.
Shelly can write 1 line in (\(\frac{5}{45}\)) mins
Shelly can write 180 lines in (\(\frac{5}{45}\)) *180 = 20 mins
Thus, the correct answer is Option B.
________________________________________
Step 1: Understand Question Statement
• Shelly can write 45 lines in 5 minutes.
• We need to find the time taken to write 180 lines.
Step 2: Define Methodology
• We need to find her rate of writing per minute and from there we can find the time taken to write 180 lines.
[img]see%20attached%20img.%20file[/img]
Step 3: Calculate the final answer
Alternate Method (Using Unitary Method)
Shelly can write 45 lines in 5 mins.
Shelly can write 1 line in (\(\frac{5}{45}\)) mins
Shelly can write 180 lines in (\(\frac{5}{45}\)) *180 = 20 mins
Thus, the correct answer is Option B.
________________________________________
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