Question

find the perimeter of a rectangular field is 390m and its breadth is 75m. find it's length

Answer 1

Solution -

Let the length be x meters

According to Question,

Perimeter of rec. field = 390

=> 2(x + 75) = 390

=> x + 75 = 390/2 = 195

=> x = 195 - 75 = 120

Therefore,

Length = x meters = 120 meters

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Answer 2

perimeter of rectangular field= 2(L+B)

390 = 2L+ 150

2L = 240

Length = 120 m