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As HCF is 7 so both are multiples of 7. LCM is 140. so there is formula which says that product of HCF and LCM gives product of two numbers . there are total 4 multiples of 7in between 20and 45. so there are 21,28,35,42. 21 and 42 donot have 140 has multiple in their tables so the numbers are 28 and 35. respectively sum is 63. please mark me as brainliest
praneethks:
shivangi
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Answer:
hcf=7
lcm=140
7*x*y=140
xy=140
___
7
xy=20
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