A, B and C invest Rs. 28000, Rs. 42000 and Rs. 56000 respectively. If C's share at the end of 1 yr is Rs. 4120, find the total profit.  Choose one.
A) Rs. 8120 B) Rs. 9270 C) Rs. 8240 D) Rs. 9150 E) None of these
Explanation:   Let ratio of capitals of A, B and C   = 28000 : 42000 : 56000   = 2 : 3 : 4   Let the total profit be Rs x.   Then, C's share = Rs. (4x/9)   But 4x/9 = 4120   =&gt; x = (4120 × 9)/4 = 9270   Hence, the total profit = Rs. 9270.   Answer: Option Rs. 9270
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A, B and C invest Rs. 28000, Rs. 42000 and Rs. 56000 respectively. If C's share at the end of 1 yr is Rs. 4120, find the total profit.