A bicycle wheel makes 5000 revolutions in moving 11 km. Find the diameter of the wheel.

A) \$82 cm\$

B) \$85 cm\$

C) \$75 cm\$

D) \$70 cm\$

The ratio of the radii of two circles is 3 : 2. What is the ratio of their circumferences?

A) \$3 : 5\$

B) \$3 : 1\$

C) \$3 : 2\$

D) \$3 : 4\$

How long will John take to make a round of a circular field of radius 21 m cycling at the speed of 8 km/hr?

A) \$57.4 seconds\$

B) \$56.4 seconds\$

C) \$59.4 seconds\$

D) \$58.4 seconds\$

The diameter of a wheel of a car is 98 cm. How many revolutions will it make to travel 6160 meters.

A) \$2000\$

B) \$2500\$

C) \$2640\$

D) \$2540\$

An ox in an oil processing apparatus is tethered to a rope 3 m long. How much distance does it cover in 14 rounds?

A) \$300 m\$

B) \$270 m\$

C) \$286 m\$

D) \$264 m\$