Question : The diameter of a wheel on a bicycle is 21 cm. The cyclist takes 45 minutes to reach a destination at a speed of 16.5 km/hr. How many revolutions will the wheel make during the journey?

Option 1: 12325

Option 2: 18750

Option 3: 21000

Option 4: 24350

Question : The diameter of each wheel of a car is 70 cm. If each wheel rotates 400 times per minute, then the speed of the car (in km/hr) is: (Take $\pi=\frac{22}{7}$)

Option 1: 0.528

Option 2: 528

Option 3: 52.8

Option 4: 5.28

Question : Two trains start from a certain place on two parallel tracks and in the same direction. The speeds of the trains are 45 km/hr and 40 km/hr respectively. The distance between the two trains after 45 minutes will be:

Option 1: 2 km 500 m

Option 2: 2 km 750 m

Option 3: 3 km 750 m

Option 4: 3 km 250 m

Question : An athlete runs 8 times around a circular field of radius 7 m in 3 minutes 40 seconds. His speed (in km/hr) is:
(Take $\pi=\frac{22}{7}$ )

Option 1: $\frac{72}{25}$

Option 2: $\frac{118}{25}$

Option 3: $\frac{144}{25}$

Option 4: $\frac{108}{25}$

Question : How many metres of 2-m-wide cloth will be required to make a conical tent with a diameter of the base of 14 m and a slant height of 9 m ignoring wastage?

Option 1: 66 m

Option 2: 88 m

Option 3: 99 m

Option 4: 77 m