A train starts with the speed of 50km/hr with its speed increasing every two hours by 20kmph. In how many hours will it cover 330 kms
Choose the correct answer.
A) 4 hrs  B) 5 hrs  C) 6 hrs  D) 4 ½ hrs  E) 5 hrs
Explanation:   Distance covered in first 2 hours = 50×2 =100km   Distance covered in next 2 hours = 70×2 =140km   Remaining distance = 330 -100-140= 
<gadget id="calculator">330 -100-140</gadget>
<output>90</output>
90km   Speed of the fifth hour=90km/hr   Time taken to cover 90km = 90/90= 
<gadget id="calculator">90/90</gadget>
<output>1</output>
1 hr   Total time taken= 2+2+ 1= 
<gadget id="calculator">2+2+ 1</gadget>
<output>5</output>
5 hrs   Answer: Option 5 hrs
<result>B</result>
A train starts with the speed of 50km/hr with its speed increasing every two hours by 20kmph. In how many hours will it cover 330 kms