Question

A park is in the form of rectangle 150m * 120 m. in the center of the park, there is a circular lawn. the area of the park excluding the lawn is 5500 sq.meter. find the radius of the circular lawn.

Answer 1

SEE,
AREA OF THE PARK EXCLUDING THE CIRCULAR LAWN = 5500 m.sq. (given)
AREA OF THE WHOLE RECTANGULAR PARK=l x b
                                                                           =150 m  x 120 m
                                                                               = 18000 m.sq.
therefore, AREA OF THE CIRCULAR LAWN=AREA OF THE WHOLE PARK - AREA OF THE PARK EXCLUDING THE CIRCULAR LAWN
                                                                     = 18000 m. sq. -  5500m.sq.
                                                                     = 12500 m.sq.