Book Maths Puzzle Time Distance and Speed

A person traveling 4hr by plane and 25hr by ship covers 1580 miles. If the speed of hte plane had been one-half of the acutal speed and the speed of the ship had been one-fourth g

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Book Other Question

A, B, and C can fnish a job in 6 days. If B and C work together, the job will take 9 days, if A and C work together, the job will take 8 days. In how many days can each man worki A person invested $10,000. The greater part is invested at 6% and the remainder at 5%. The annual income from the greater part is $160 more than the annual income from the smalle