The ratio of incomes of C and D is 3 : 2. Ratio of income of D and E is 5 : 4. If one-third of C’s income is Rs. 4000 more than the half of E’s income, then what is D’s income (in Rs.)?
1). 40000
2). 43000
3). 50000
4). 60000
Ratio of income of C and D = 3 ? 2 = 15 ? 10
Also,
Ratio of income of D and E = 5 ? 4 = 10 ? 2
Let income of C, D and E be 15x, 10x and 8x respectively
According to the question
⇒ (1/3) of 15x = (1/2) of 8x + 4000
⇒ 5x = 4x + 4000
⇒ x = 4000
∴ D’s income = 10x = 10 × 4000 = 40,0006. How many sides does a regular polygon have whose interior and exterior angles are in the ratio 2:1
7. If the third proportion of two numbers is 27 and the first number is 12, then find the 2nd number.
10. If $\frac{3}{5}P$ = $\frac{7}{2}Q$ = $\frac{7}{5}R$ ,then waht is the ratio of P,Q and R?