Sudha decided to donate 12% of her monthly income to an orphanage. On the day of donation, she changed her decision and donated a sum of ₹4800 which was equal to 80% of what she had decided earlier. What is 27% of her monthly income?
A sum invested at 8% p.a. amounts to ₹20280 at the end of one year, when the interest is compounded half yearly. What will be the simple interest on the same sum for years at double the earlier rate of interest ?
Three articles are bought at ₹200 each. One of the mis sold at a loss of 10%. If the other two articles are sold so as to gain 20% on the whole transaction, then what is the gain percent on the two articles?
A can do 40% of a work in 6 days and B can do 30% of the same work in 3 days. They started the work together but B left after 2days and A continued to work. In how many days was the entire work completed?