The L.C.M. of two toies numbers is 20 their H.C.F. The sum of H C.F. and L.C.M. is 2520. If one of the number is 480, the other number is :

The L.C.M. of two toies numbers is 20 their H.C.F. The sum of H C.F. and L.C.M. is 2520. If one of the number is 480, the other number is :
1). 400
2). 480
3). 520
4). 600

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