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David and his wife each receives an 8 percent annual rise. If David receives a raise Rs. 800 and his wife receives a raise of Rs. 840, what is the difference between their annual incomes after their raises?

 

(a)

Rs. 40

(b)

Rs. 460

(c)

Rs. 500

(d)

Rs. 540


Question ID - 56659 | Toppr Answer

David and his wife each receives an 8 percent annual rise. If David receives a raise Rs. 800 and his wife receives a raise of Rs. 840, what is the difference between their annual incomes after their raises?

 

(a)

Rs. 40

(b)

Rs. 460

(c)

Rs. 500

(d)

Rs. 540

1 Answer - 5876 Votes

3537

Answer Key : (d) -

Let David’s annual income be Rs.  and his wife’s income be Rs.

Then, 8% of

And,  of

Required difference = Rs. [(10500+840)(10000+800)]=Rs. 540.



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