Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
A motor car starts with the speed of 70 km/hr with its speed increasing every two hours by 10 kmph. In how many hours will it cover 345 kms? 1
(a)2 hrs 4
(b)4 hrs 5 min 1
(c)4 hrs 2
(d)Cannot be determined
(e)None of these
Answer
Answer (as printed): C
Explanation
Distance covered in first 2 hours = (70 × 2) km = 140 km. Distance covered in next 2 hours = (80 × 2) km = 160 km. Remaining distance = 345 – (140 + 160) = 45 km. Speed in the fifth hour = 90 km/hr. 45 1 Time taken to cover 45 km = hr = hr. 90 2 1 1 \ Total time taken = 2 + 2 + = 4 hrs. 2 2
Explanation as extracted from the printed page; notation may be imperfect.