Question

the area of rectangular field is 270000sq.meters.the ratio of its sides is 4:3 .find its perimeter and time of rounding about it at the rate of 51/4km. pet hr.
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Answer 1

Answer:

area of rectangle=270000sq.m

ratio of sides. =4:3

length×breath=270000

4x×3x=270000

12x=270000

x=270000/12

x=22500

therefore length of rectangle=4x=4×22500

=90000m

therefore breadth of rectangle=3x=3×22500

=67500m

perimeter of rectangle=2(l+b)

=2×(90000+67500)

=2×157500

=315000m or 315km

therefore distance=315km,

speed =51/4kmph

so,

time=distance/speed

=315/(51/4)

=315×4/51

=1260/51

=24.8hours

therefore time taken for rounding the field=24.8hours