Andrew takes 3 hour 40 minutes more than Nina in covering a distance of 19.88 miles. If Andrew increases his speed by three times of his original speed then he would take 80 minutes less than Nina. What is Andrew

Mary is thrice as old as Lisa and Ian is 60 months older than Mary. If the sum of ages of Mary, Lisa, and Ian is 63 years and 4 months, then what is Mary's age?

If the price of a particular chemical is $15 per 650 centigrams, then what will be the approximate price of 1560 carats of that chemical?

The current age of Elena is four times the age of Nina. After 84 months, the ratio of ages of Elena and Nina will be 5:3. What will be the ratio after 11 years?

Daniel borrowed a certain amount of money from a bank at a quarterly rate of 2.5% for 4 years. If the interest paid by him after 4 years is $624 then what is the value of principal amount?

174 miles= ______________ kilometers