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- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Correct Answer: A
Correct Answer: A
Method / Topic: Mensuration
The answer keeps the ratio proportional.
Short Explanation
Detailed Explanation
Correct Answer: A
Method / Topic: Mensuration
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">The track area is the difference of two circle areas. Substituting radii 21 m and 14 m gives 770 m².</span></td>
</tr>
</tbody>
</table>
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
A circular track lies between concentric circles of radii 21 m and 14 m. Find its area. Use π=22/7.
Explanation
Correct Answer: A
Method / Topic: Mensuration
The answer keeps the ratio proportional.
Short Explanation
Detailed Explanation
Correct Answer: A
Method / Topic: Mensuration
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">The track area is the difference of two circle areas. Substituting radii 21 m and 14 m gives 770 m².</span></td>
</tr>
</tbody>
</table>
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