alleryदो बहनों की आयु का अनुपात 5 : 7 है और चार वर्ष पहले उनकी आयु का योग 40 था। बड़ी बहन की वर्तमान आयु क्या है?
A26
B28
C20
D24
Answer & Solution
Correct answer: B. 28
वर्तमान योग 12 भागों पर 48 है, इसलिए एक भाग 4 है और बड़ी बहन की वर्तमान आयु 7 x 4 = 28 वर्ष है।
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