book Maths Puzzle Numerical Ability

Doug can deliver his pspers in 45 minutes. If Meg helps, they can finish in 20 minutes. How long will it take Meg to work alone?

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Raeo Corp. bonds trade at 100 today. the bonds pay semiannual interest that is paid on January 1 and July 1. the coupon on the bonds is 10percent. how much will you pay for a Raeo Phil & phyllis are siblings. phyllis has twice as many brothers as she has sisters. phil has the same number of brothers as sisters. how many girls and how many boys?