alleryબે બહેનોની ઉંમરનો ગુણોત્તર 5 : 7 છે અને ચાર વર્ષ પહેલાં તેમની ઉંમરનો સરવાળો 40 હતો. મોટી બહેનની હાલની ઉંમર કેટલી છે?
A26
B28
C20
D24
Answer & Solution
Correct answer: B. 28
હાલનો સરવાળો 12 ભાગ પર 48 થાય છે, તેથી એક ભાગ 4 છે અને મોટી બહેનની ઉંમર 7 x 4 = 28 છે.
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