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Linear Equations In One Variable

Question
CBSEENMA8002286

There is a narrow rectangular plot, reserved for a school, in Mahuli village. The length and breadth of the plot are in the ratio 11 : 4. At the rate Rs 100 per metre it will cost the village panchayat Rs 75000 to fence the plot. What are the dimensions of the plot?

Solution

Let the length = 11x metres
and      breadth = 4x metres

∴         Perimeter = 2(Length + Breadth)
                        = 2(11x + 4x)
                        = 2 cross times 15x
                         = 30x

∴          Cost of fencing = Rs 100 cross times30x
                                = Rs 3000x
  But the cost of fencing is Rs 75000.

∴                              3000x = 75000.
or                                     x equals 75000 over 3000 equals 25

∴                                 Length = 11 cross times 25 = 275 metres
                                   Breadth = 4 cross times25 = 100 metres


 

Some More Questions From Linear Equations in One Variable Chapter

Solve the following equation:

6 = z + 2