A culprit was spotted by a policeman from a distance of 250 meter. When the policeman started running towards the culprit at a speed of 10 km/h, the culprit also fled. If his speed was 8 km/h, find how far the culprit had run before he was overpowered.

Created: 7 years ago | Updated: 1 year ago

Updated: 1 year ago

1km

1.5 km

2 km

0.8 km

National Bank Ltd National Bank Ltd - Probationary Officer - 22.05.2015 গণিত সময়, দূরত্ব ও গতিবেগ (Time, distance & speed)

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প্রশ্ন: A culprit was spotted by a policeman from a distance of 250 meter. When the policeman started running towards the culprit at a speed of 10 km/h, the culprit also fled. If his speed was 8 km/h, find how far the culprit had run before he was overpowered.

পুলিশের গতিবেগ 10 km/hr 
অপরাধীর ”    8 km/hr 
অপরাধী সাপেক্ষে পুলিশের আপেক্ষিক গতিবেগ 2 km/hr 
অর্থাৎ পুলিশ প্রতি ঘণ্টায় 2 km সামনে আগায়। 
এখন, 25O1m  =  0.25 km 
পুলিশ 2k  আগায়1 ঘণ্টায় 
 $∴$      "    0.25   "    $\frac{0.25}{2}$   =  0.125   " 
এই সময়ে অপরাধী অতিক্রম করে (0.125  $\times$  8) km  =  1 km