Educational

A train starts from a place S at 10.00 am and arrives at another phase T at 2.30 pm on the same day. If the speed of the train is 40m/s then what will be the distance covered by the train?

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Options A) 706 B) 648 C) 726 D) 616 Solution Train starts from place S, 10 Am Stops at T at 2.30 Am Total time taken from 10Am to 2.30 pm is 4.1/2 hrs Speed of the train is 40 m/s First should convert m/s to km/r, by multiply with 18/5 40× 18/5 = 144 … Read more

To complete a wall, X takes 50 % more time than Y. If together they complete the wall in 15 days, then how much time will X alone takes to complete it

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options A) 42.5 Days B) 40 Days C) 36.5 Days D) 37.5 Days Detailed solution Lets take it as 100, then X = 150 Y = 100 X/Y = 150/100 = 3/2 Efficiency of work are in above ratio. ( Efficiency is always inversely proportion to time) Total work = 15 days ( 2+3) unit … Read more