77\,cm,\,\,\therefore r=\FRAC{77}{2}cm\] \[C=2gpr=2\TIMES \frac{22}{7}\times \frac{77}{2}=242cm\] No. of revolution\[\text{=}\frac{\text{distance}}{\text{circumference}}\text{=}\frac{\text{121km}}{\text{242cm}}\] \[=\frac{121\times 1000\times 100}{242}=50,000\]

"> 77\,cm,\,\,\therefore r=\FRAC{77}{2}cm\] \[C=2gpr=2\TIMES \frac{22}{7}\times \frac{77}{2}=242cm\] No. of revolution\[\text{=}\frac{\text{distance}}{\text{circumference}}\text{=}\frac{\text{121km}}{\text{242cm}}\] \[=\frac{121\times 1000\times 100}{242}=50,000\]

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The diameter of the wheel of a car is 77 cm. How many revolutions will it make to travel 121 km?

10th Class Mathematics in 10th Class 11 months ago

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\[2r=77\,cm,\,\,\therefore r=\FRAC{77}{2}cm\] \[C=2gpr=2\TIMES \frac{22}{7}\times \frac{77}{2}=242cm\] No. of revolution\[\text{=}\frac{\text{distance}}{\text{circumference}}\text{=}\frac{\text{121km}}{\text{242cm}}\] \[=\frac{121\times 1000\times 100}{242}=50,000\]

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