A) \[\text{4224 c}{{\text{m}}^{\text{2}}}\]
B) \[\text{3696 c}{{\text{m}}^{\text{2}}}\]
C) \[\text{1848 c}{{\text{m}}^{\text{2}}}\]
D) \[\text{5544 c}{{\text{m}}^{\text{2}}}\]
Correct Answer: B
Solution :
| [b] Clearly, each wiper sweeps a sector of a circle of radius \[42cm\]and sector angle \[120{}^\circ \]. |
| \[\therefore \]Total area cleaned at each sweep |
| \[=2\times \frac{120{}^\circ }{360{}^\circ }\times \frac{22}{7}\times 42\times 42c{{m}^{2}}\] |
| \[=3696\,c{{m}^{2}}\] |
You need to login to perform this action.
You will be redirected in
3 sec
