A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 640 m long?
Pick one.
A) 22 B) 89 C) 88 D) 278 E) 291
Speed = 240/24= 
<gadget id="calculator">240/24</gadget>
<output>10</output>
10 m/sec.   Required time= (240 + 640)/10= 
<gadget id="calculator">(240 + 640)/10</gadget>
<output>88</output>
88 sec.   Answer: 88
<result>C</result>
A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 640 m long?