MATH DOSE 5

1. If the ratio of present age of A and B is 6:5 and 4 year ago the age was in ratio 5:4 find the ratio of age after 12 year. (Answer- 9 : 8)

2. a + b + c = 4 , ab + bc + ca = 1 then find the value of a³+b³+c³ (Answer- 52)

3. If Adarsh spend 90% of his income. If its expenditure increase by 25% and saving increase by 30% then how much percent his salary increases. (25.5%) 

4. Abhi sold two articles at 5220rs each. If he get profit of 16% on first article and loss of 10% on other article find total price of profit/loss. (Answer- 140)

5. A and B can work together in 16 day. C and A can complete work 32 day.  B and C complete the work in 24 day. They work together for 12 day. In how many day C complete the rest work alone.