A) 8 km/h
B) 6.86 km/h
C) 15.23 km/h
D) None of these
Correct Answer: C
Solution :
| [c] Total distance travelled by the cyclist is, |
| \[d=R+\frac{3}{4}\times 2\pi r=\left( 2+\frac{3}{4}\times 2\pi \times 2 \right)\,km\] |
| \[\Rightarrow \] \[d=(2+3\pi )\,km\] |
| Average speed, |
| \[v=\frac{d}{t}=\frac{2+3\pi }{\frac{3}{4}}km\text{/}h=15.23\,km\text{/}h\] |
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