Self Maths Puzzle Numerical Ability Ratio and Proportion

If the length of rectangle is increased by 6:7 and the breadth is decreased by 5:4 then its area will diminish in the ratio

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Self Other Question
I have 24.3 kg of apples, 1.7 kg banana, 0.04 kg grapes, 12.55 kg orange, 0.89 kg mango and 7.9 kg kiwi , a total of 47.38 kg of all fruits. some one ate 43.56 kg of fruits and I left with 3.82 kg.
Now how to calculate the amount of each fruit eaten (in terms of mass, kg)
very confusing pleaseeee give me reference if there any off campus of IBM in kolkata. my mail address-saiti64@gmail.com.....plsssssssssss....................