D. 20.2 sec<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Answer :\u00a0<\/b>A. 14.4 sec<\/h3>\n

\n

Explanation :<\/h2>\n<\/div>\n

\n

\n

Let length of each train be x meter.
\nThen, speed of 1^{st<\/sup>\u00a0train = x\/18 m\/sec
\nSpeed of 2nd<\/sup>\u00a0train = x\/12 m\/sec<\/p>\n}

Now, When both trains cross each other, time taken
\n= [ 2x\/((x \/ 18 ) + (x \/ 12)) ]\n= 2x \/ [(2x + 3x) \/ 36] = 2x * 36 \/ 5x
\n= 72 \/ 5
\n= 14.4 seconds.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Answer :\u00a0A. 14.4 sec<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"passster_activate_protection":false,"passster_protect_child_pages":"","passster_protection_type":"password","passster_password":"","passster_activate_overwrite_defaults":"","passster_headline":"","passster_instruction":"","passster_placeholder":"","passster_button":"","passster_id":"","passster_activate_misc_settings":"","passster_redirect_url":"","passster_hide":"no","passster_area_shortcode":"","gtb_hide_title":false,"gtb_wrap_title":false,"gtb_class_title":"","gtb_remove_headerfooter":false,"footnotes":""},"categories":[12130],"tags":[12132,12150,12148,12160,12161,12147,12152,10954,10957,10956,10977,10972,10984,11000,11005,10944,10945,10966,10942,10947,11012,11010,10985,10973,11014,10982,10998,10981,11015,7386,10969,12149,10960,10983,9747,10988,10995,10993,10971,11016,10970,11004,10987,10958,11003,10974,10940,10959,9751,10980,10976,11002,10986,10994,10951,11009,10943,286,10946,9385,10979,10992,10949,10989,10996,9391,11007,10965,10955,11011,10964,10961,10997,16273,10978,10963,10967,10990,11006,10941,11001,10950,10991,10975,10952,10953,11008,12159,12158,12154,12153,12151,12157,12156,12155,10948,10999,11013,10962,16269,15823,10968],"class_list":["post-1798","post","type-post","status-publish","format-standard","hentry","category-problems-on-trains","tag-2-trains-travelling-in-opposite-directions","tag-a-600-meter-long-train-crosses-a-signal-post-in-40-seconds","tag-a-train-350-metres-long-crosses-an-electric-pole-in-28-seconds-find-the-speed-of-the-train-in-km-hr","tag-a-train-crosses-a-pole-in-10-seconds","tag-a-train-moves-past-a-telegraph-post","tag-a-train-running-at-the-speed-of-60-km-hr-crosses-a-pole-in-9-seconds-find-the-length-of-the-train","tag-a-train-speed-past-a-pole-in-15-seconds-and-a-platform-100-m-long-in-25-seconds-its-length-is","tag-adani-enterpris-interview-questions-and-answers","tag-adani-green-energy-ltd-interview-questions-and-answers","tag-adani-ports-ltd-interview-questions-and-answers","tag-adani-total-gas-ltd-interview-questions-and-answers","tag-adani-transmission-ltd-interview-questions-and-answers","tag-ambuja-cements-interview-questions-and-answers","tag-apollo-hospital-interview-questions-and-answers","tag-aurobindo-pharm-interview-questions-and-answers","tag-avenue-supermarts-ltd-interview-questions-and-answers","tag-axis-bank-interview-questions-and-answers","tag-bajaj-auto-interview-questions-and-answers","tag-bajaj-finance-interview-questions-and-answers","tag-bajaj-finserv-ltd-interview-questions-and-answers","tag-balkrishna-industries-interview-questions-and-answers","tag-bandhan-bank-interview-questions-and-answers","tag-berger-paints-interview-questions-and-answers","tag-bharat-petroleum-corporation-ltd-interview-questions-and-answers","tag-biocon-interview-questions-and-answers","tag-britannia-industries-ltd-interview-questions-and-answers","tag-cadila-health-interview-questions-and-answers","tag-coal-india-ltd-interview-questions-and-answers","tag-colgate-interview-questions-and-answers","tag-cts-interview-questions-and-answers","tag-dabur-india-ltd-interview-questions-and-answers","tag-determine-the-speed-of-a-train-of-length-240-meters-if-it-crosses-a-pole-in-15-seconds","tag-divis-labs-interview-questions-and-answers","tag-dlf-interview-questions-and-answers","tag-dr-reddys-labs-interview-questions-and-answers","tag-eicher-motors-ltd-interview-questions-and-answers","tag-gail-india-ltd-interview-questions-and-answers","tag-gland-pharma-ltd-interview-questions-and-answers","tag-godrej-consumer-products-ltd-interview-questions-and-answers","tag-godrej-properties-interview-questions-and-answers","tag-grasim-industries-ltd-interview-questions-and-answers","tag-gujarat-gas-ltd-interview-questions-and-answers","tag-havells-india-ltd-interview-questions-and-answers","tag-hdfc-life-insurance-company-ltd-interview-questions-and-answers","tag-hero-motocorp-interview-questions-and-answers","tag-hindalco-industries-ltd-interview-questions-and-answers","tag-hindustan-unilever-ltd-interview-questions-and-answers","tag-hindustan-zinc-ltd-interview-questions-and-answers","tag-icici-lombard-interview-questions-and-answers","tag-icici-prudential-life-insurance-interview-questions-and-answers","tag-indian-oil-corporation-ltd-interview-questions-and-answers","tag-indus-towers-ltd-interview-questions-and-answers","tag-indusind-bank-interview-questions-and-answers","tag-interglobe-aviation-interview-questions-and-answers","tag-jsw-steel-interview-questions-and-answers","tag-jubilant-foodworks-ltd-interview-questions-and-answers","tag-kotak-mahindra-bank-interview-questions-and-answers","tag-lt-infotech-interview-questions-and-answers","tag-larsen-and-toubro-ltd-interview-questions-and-answers","tag-lupin-interview-questions-and-answers","tag-mm-interview-questions-and-answers","tag-marico-interview-questions-and-answers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