Site navigation

Vinita drives a car which has four gears. The speed of the car in the fourth gear is five times its speed in the first gear. The car takes twice the time to travel a certain distance in the second…

Question and options

Vinita drives a car which has four gears. The speed of the car in the fourth gear is five times its speed in the first gear. The car takes twice the time to travel a certain distance in the second gear as compared to the third gear. In a 100 km journey, if Vinita travels equal distances in each of the gears, she takes 585 minutes to complete the journey. Instead, if the distances covered in the first, second, third, and fourth gears are 4 km, 4 km, 32 km, and 60 km, respectively, then the total time taken, in minutes, to complete the journey, will be
  1. 624
  2. 273
  3. 312
  4. 585

Answer and explanation

Correct answer: C - 312

The journey takes 312312 minutes. Let u,vu,v be minutes per kilometre in first and second gear, so third and fourth require v/2v/2 and u/5u/5 minutes per kilometre. The equal-distance trip gives 30u+37.5v=58530u+37.5v=585, and the changed distances give 16u+20v=815(30u+37.5v)=31216u+20v=\frac8{15}(30u+37.5v)=312. The value 273273 is the time saved.

Practice for these exams

  • IPMAT Indore

Related question papers

Related exam syllabi

More solved explanations in Arithmetic