Question

the area of a rectangular field whose lengths is 3 times its breath is 384 m2.estimate it's lengthe to the nearest whole number of metre

Answer 1

GIVEN
Area of rectangular field = 384 m^2 ... (1)

ASSUMING
Let the breadth of rectangular field = X m
Then the length of the rectangular field = 3X m


FORMULA
Area of rectangle = length x breadth

SUBSITUTE
Area of rectangular field = X x 3X
= 3X^2 ............. (2)

By (1) & (2)
3X^2 = 384
X^2 = 192
X = 13.82 (approx)

Breadth of rectangular field = 13.82 m
Therefore, the length of rectangular field
= 3 x 13.82 = 41.46 (approx)

Estimated length near whole number
= 42 metres.