Two numbers are in the ratio 3 : 5. If their L.C.M. is 210. what is product of the numbers?

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31 May 2018 LCM Two numbers are in the ratio 3 : 5. If their L.C.M. is 210. what is product of the numbers?: OPtion
1) 2940
2) 2730
3) 2960
4) 2715
5) 3110
6) 2907
7) 2840
8) 2870
9) 2890
10) None of these; Correct Option: 1 Best Solution (6)

Mukund Manohar 6 years AGO

Let the number be 3x and 5x
LCM of 3x and 5x = 15x
Now, 15x = 210
=> x = 210/15 = 14
3x = 14*3 = 42
and, 5x = 5*14 = 70
Required Product = 42*70 = 2940

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G.S.Kantharao 6 years AGO

Let the numbers are 3x,5x
L.C.M=15x=210
x=14
Product=15*x^2=15*196=2940
Hence the right option is 1👈

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Varun 6 years AGO

3×5 = 15
210/15 = 14
14×3 = 42
14×5 = 70
70×42 = 2940 = Option (1)

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Titir Misra 6 years AGO

Let the numbers be 3x and 5x. So the LCM becomes 15x
Thus, 15x=210
x=14
Thus the numbers are 42 and 70
Product of the numbers= 2940

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ARINJOY GHOSH 6 years AGO

Let the numbers be=3k and 5k
LCM=15k and product=15k^2
Now,15k=210
k=14
15K^2=15*14^2=2940
product=2940

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SAYAN CHATTERJEE 6 years AGO

Let the numbers be 3x and 5x..so, the LCM = 15x= 210..so, x= 14.
Hence, the nos. are 42 & 70.
So, the product is 42*70 = 2940.
Option 1.

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