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- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Correct Answer: B
Correct Answer: B
Method / Topic: Mensuration
The answer keeps the ratio proportional.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Mensuration
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:1px solid #44b3e1; border-left:none; border-right:none; border-top:1px solid #44b3e1; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">Outer area=60×40=2,400 m². The inner rectangle loses 5 m on both sides of each dimension, so its dimensions are 50 m and 30 m. Inner area=1,500 m². Path area=2,400−1,500=900 m². The calculation is checked against the conditions in the
. A useful final check is to substitute the
s involving signs, denominators, amount versus interest, and distance versus speed.</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 rectangular park is 60 m long and 40 m wide. A path 5 m wide runs inside along all sides. Find the area of the path.
Explanation
Correct Answer: B
Method / Topic: Mensuration
The answer keeps the ratio proportional.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Mensuration
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:1px solid #44b3e1; border-left:none; border-right:none; border-top:1px solid #44b3e1; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">Outer area=60×40=2,400 m². The inner rectangle loses 5 m on both sides of each dimension, so its dimensions are 50 m and 30 m. Inner area=1,500 m². Path area=2,400−1,500=900 m². The calculation is checked against the conditions in the
. A useful final check is to substitute the
s involving signs, denominators, amount versus interest, and distance versus speed.</span></td>
</tr>
</tbody>
</table>
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