12. Four mark exercise problems IV

1. Two gates are fitted at the entrance of a library. To open the gates easily, a when is fixed at \(6 \ feet\) distance from the wall to which the gate is fixed. If one of the gates is opened to \(90^{\circ}\), find the distance moved by the wheel. \((\pi = 3.14)\).

 

 

Answer:

 

Distance moved by the wheel \(=\)  \(ft\)

 

(Note: Round off the answer to \(2\) decimal places.)

 

2. With his usual speed, if a person covers a circular track of radius \(150 \ m\) in \(9\) minutes, find the distance that he covers in \(3\) minutes. (\pi = 3.14\))

 

Answer:

 

Distance that a person covers \(=\)  \(m\)