The radius of a circular wheel is . How many revolutions will it make in travelling 11 km. (π=
A1000
B1100
C900
D1200
The radius of a circular wheel is . How many revolutions will it make in travelling 11 km. (π=
A1000
B1100
C900
D1200
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A cow is tied on the corner of a rectangular field of size 30 m ×20 m by a 14m long rope. The area of the region, that she can graze, is :