a is greater than b by 2 and b is greater than c by 10. If (a + b + c) = 130, then b+c-a = ?

A 34

B 36

C 38

D 39

Solution

Correct Answer: Option A

এখানে ,
a-b=2
বা,a=b+2.......(i)
আবার, b-c=10
       বা, b-10=c
       বা,c=b-10...........(ii)
আবার, a+b+c=130
        বা,b+2+b+b-10=130
        বা,3b-8=130
        বা,3b=138
        বা,b=46
অতএব ,(i) বা, a =46+2=48
(ii)বা c=46-10=36
অতএব ,b+c-a=46+36-48 =34

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