Word Problems on Rational Numbers

 

Demonstration:

  • From a thread 11 m long, two pieces of lengths 13/5 m and 33/10 m are cut off. What is the length of the remaining rope?

    Total Length : 11/1 m= 11.0m

    Total length of the two pieces cut off = 13/5+33/10= 2.6+3.3

    So total length thats cut off from the thread can be written as 5.9m

    Length of remaining Rope = 11.0- 5.9= 5.1m

    This decimal can be represented in fraction again as 51/10m

    Answer: 51/10 m

  • A train covers 100 km in an hour. How much distance will it cover in 25/6 hours?

    In 1 hour airplane covers a distance = 100km 

    In 25/6 hours airplane will cover distance of = 100/1 x(25/6)

    = 100.0 x 4.1666

    = 416.6

    Answer: 416.6 km