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53. What weight of water must be added to 50lb of a 45% brine solution to yield a 20% solution? c. 62.5lbs d. 37.5 lbs. a. 61.3 lbs. b. 55.1 lbs. 54 The tone digit of a certain two digit number exceede the unite digit by 4 and 4 less than thrice the unite digit

53. What weight of water must be added to 50lb of a 45% brine solution to yield a 20% solution? c. 62.5lbs d. 37.5 lbs. a. 61.3 lbs. b. 55.1 lbs. 54 The tone digit of a certain two digit number exceede the unite digit by 4 and 4 less than thrice the unite digit

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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53. What weight of water must be added to 50lb of a 45% brine solution to yield a 20% solution? b. 55.1 lbs. a. 61.3 lbs. c. 62.5lbs d. 37.5 lbs. 54. The tens digit of a certain two digit number exceeds the units digit by 4 and 4 less than thrice the units digit. Find the two digit number. a. 37 b. 84 c. 58 d. 99 55. The tens digit of a certain two digit number is 1/3 of the units digit. When the digits are reversed, the new numbers exceeds twice the original number by 1 more than the sum of the digits. Find the original number. a. 26 b. 39 c. 13 d. 28 56. The denominator of a certain fraction is three more than twice the numerator. If 7 is added to both terms of the fraction, the resulting fraction is 3/5. Find the original fraction. a. 8/5 b. 13/5 c. 5/13 d. 3/5 57. A man left their office at past 3 o'clock for merienda. After 20 minutes on his return, he noticed that the minute hand is ahead of the hour hand exactly by as much as it was behind when he left. At what time did he leave? a. 3:07.36 b. 3:08.36 c. 3:06.16 d. 3:06.36
Transcribed Image Text:53. What weight of water must be added to 50lb of a 45% brine solution to yield a 20% solution? b. 55.1 lbs. a. 61.3 lbs. c. 62.5lbs d. 37.5 lbs. 54. The tens digit of a certain two digit number exceeds the units digit by 4 and 4 less than thrice the units digit. Find the two digit number. a. 37 b. 84 c. 58 d. 99 55. The tens digit of a certain two digit number is 1/3 of the units digit. When the digits are reversed, the new numbers exceeds twice the original number by 1 more than the sum of the digits. Find the original number. a. 26 b. 39 c. 13 d. 28 56. The denominator of a certain fraction is three more than twice the numerator. If 7 is added to both terms of the fraction, the resulting fraction is 3/5. Find the original fraction. a. 8/5 b. 13/5 c. 5/13 d. 3/5 57. A man left their office at past 3 o'clock for merienda. After 20 minutes on his return, he noticed that the minute hand is ahead of the hour hand exactly by as much as it was behind when he left. At what time did he leave? a. 3:07.36 b. 3:08.36 c. 3:06.16 d. 3:06.36
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