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Question
Two numbers are in the ratio 3 : 5. If each is increased by 10, the ratio becomes 5 : 7. The numbers are :
3, 5
12, 20
15, 25
30, 42
ANSWER : 3
Descrption
<p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">Let the ratio of the numbers be 3x and 5x .</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">If each number is increased by 10 .</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">then ,</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">(3x + 10)/(5x + 10) = 5/7</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">or, 21x + 70 = 25x + 50</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">or, 21x - 25x = 50 - 70</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">or, - 4x = - 20</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">or, x = 5 .</p> <p style = "box - sizing: border - box; margin - top: 0px; margin - bottom: 1rem; font - size: 1.1em; line - height: 1.7em; font - family: bangla, sans - serif; color: #212529; background - color: #ffffff; text - align: left;">so, Numbers are 15 and 25</p>
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