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 $=$  $m$