alleryA आनी B 10 दीस, B आनी C 15 दीस, A आनी C 12 दीस घेतात. तिनूय एकठांय घेतात
A9 दीस
B6 दीस
C7.5 दीस
D8 दीस
Answer & Solution
Correct answer: D. 8 दीस
दुप्पट एकत्रीत दर 1/10 + 1/15 + 1/12 = 1/4 आसता, देखून तीं तीनूय एकठांय करतात 1/8 दर दिसा.
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