A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road? Choose the correct choice from the following options.
A) 2.2 m B) 2.4 m C) 3 m D) 3.4 m E) 3.6 m
Area of the park = (60 x 40) m2= 2400 m2.   Area of the lawn = 2109 m2.   Area of the crossroads = (2400 - 2109) m2= 291 m2.   Let the width of the road be x metres. Then,   60x + 40x - x2 = 291   x2 - 100x + 291 = 0   (x - 97)(x - 3) = 0   x = 3.   ANSWER : 3 m
<result>C</result>
A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?