13.
A wheel rotates 10 times every minute and moves 20 cm during each rotation. How
many ems does the wheel move in 1 hour?. [Asst Grade 1994]
A.2000 B.1200
C.600 D.12000
Answer: 12000
Explanation: Number of wheel moves in 1 hour = 10 *
60 = 600
distance
moved = 600 * 200 = 12000
