RRB RPF RPSF SI and CONS Model Papers 8 with solutions

Question : 47 of 120

Marks: +1, -0

The sides of a rectangular plot are in the ratio 5:4 and its area is equal to 500 sq.m. The perimeter of the plot is :

Solution:

(3) Area of rectangle = L × B

∴5x × 4x = 500

sq.m.
or,

2 {x}^{2}=500 {\sq}. {m}

∴

x^{2}= {500}/{20}=25

∴x=5

\L=5 × 5=25 {m}

B = 5 × 4 = 20 m
∴ Perimeter = 2 (L + B)m
= 2 (25 + 20) = 2 × 45 = 90 m

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