At 1:00:00 P.M., a file transfer was resumed, and data was transferred

Question

At 1:00:00 P.M., a file transfer was resumed, and data was transferred at a constant rate of 200 megabytes per second. When the total data transfer reached 5,000 megabytes, the transfer ceased. Had at least 2,000 megabytes of data already been transferred before the transfer resumed at 1:00:00 PM. ?

(1) Total 2,700 megabytes of data was transferred by 1:00:05 P.M.

(2) Total 4,700 megabytes of data was transferred by 1:00:15 P.M.

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ManifestDreamMBA · Answer

Rate of transfer after 1PM = 200 Mb/s

Had at least 2,000 megabytes of data already been transferred before the transfer resumed at 1:00:00 PM ?

Statement 1
Total 2,700 megabytes of data was transferred by 1:00:05 PM
After 1PM, in 5 secs, it transferred 5*200 = 1000 Mb
This suggests before 1PM, it was 2700-1000 = 1700 Mb
Sufficient

Statement 2
Total 4,700 megabytes of data was transferred by 1:00:15 PM
After 1PM, in 15 secs, it transferred 15*200 = 3000 Mb
This suggests before 1PM, it was 4700-3000 = 1700 Mb
Sufficient

Answer D

Dereno · Answer

At 1:00:00 PM the data transfer resumed. ( it means before there was some data transfer and has stopped working due to some issues).

The rate of data transfer after resuming is 200 MBPS.

Transfer stops if TOTAL DATA transferred is 5000 MB.

We need to find :  was the data transfer before resuming (1:00:00 PM) >= 2000 MB ????

Statement 1:

(1) Total 2,700 megabytes of data was transferred by 1:00:05 P.M.

We know that after 1:00:00 PM the rate is 200 MBPS.

in 5 secs , data transfer is 200 * 5 = 1000 MB

But, the Total data transfer is 2700 MB = ( data before 1 pm  + data after 1 pm)

Hence, data before 1 pm = 2700 - 1000 = 1700 MB.

SUFFICIENT

Statement 2:

(2) Total 4,700 megabytes of data was transferred by 1:00:15 P.M.

In 15 secs, data transferred = 15*200 MBPS = 3000 MB

But, the Total data transfer is 4700 MB = ( data before 1 pm  + data after 1 pm)

Hence, data before 1 pm = 4700 - 3000 = 1700 MB.

SUFFICIENT

Both statements are individually sufficient.  Option D

Abhiswarup · Answer

Statement 1
Total 2,700 megabytes of data was transferred by 1:00:05 P.M.
transfer rate 200bytes/sec
in 5 sec 1000 bytes transferred
thus by 1:00:00 total bytes already transferred= 1700 bytes
Thus statement sufficient to tell whether by 1:00:00 2000 bytes have been transferred.

Statement 2
Total 4,700 megabytes of data was transferred by 1:00:15 P.M.
transfer rate 200bytes/sec
in 15 sec 3000 bytes transferred
thus by 1:00:00 total bytes already transferred= 1700 bytes
Thus statement sufficient to tell whether by 1:00:00 2000 bytes have been transferred.

Both statements sufficient to answer. D is answer.

At 1:00:00 P.M., a file transfer was resumed, and data was transferred

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GMAT Data Sufficiency (DS) Questions

At 1:00:00 P.M., a file transfer was resumed, and data was transferred

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards