A) 30
B) 31
C) \[\text{31}.\text{68}\]
D) 35
Correct Answer: C
Solution :
[c] Circumference of the wheel \[=\pi \times 1.4\,m\] |
\[=\frac{22}{7}\times 1.4=4.4\,m\] |
\[\therefore \] Distance covered in 10 revolutions |
\[=10\times 4.4\,m=44\,m\] |
\[\therefore \] Speed \[=\frac{44}{5}m/s.=\frac{44}{5}\times \frac{18}{5}=31.68km/h\] |
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