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Mukesh Kumar

· started a discussion

· 1 Months ago

Q73 (Question:45190.0)

Number = 10x 10y
LCM =10xy
10xy=120
xy=12
possible pair (12,1)(3,4) and (6,2)
so sum will be = 10*12+10*1=130
=10*3+10*4 =70
=10*6+10*2 =80
In the given question answer option B=80 so 80 should be correct ans.

Question:
LCM of two numbers is 120 and their H.C.F. is 10. Which of the following can be the sum of those two numbers?
Options:
A) 140
B) 80
C) 60
D) 70
Solution:

Number=10x and 10y.

LCM=10xy

10xy=120

xy=12.

Possible pair (3,4)

Sum will be= 10\(\times\)30\(+\)10\(\times\)4=70

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Given answer is correct.
Keep learning,
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