Question : The downstream speed of a boat is 25 km/ hr and the speed of a stream is 3 km/hr. What will be the total time taken by the boat to cover 100 km downstream and 57 km upstream?
Option 1: 10 hours
Option 2: 7 hours
Option 3: 10.5 hours
Option 4: 8 hours
New: SSC CHSL Tier 2 answer key released | SSC CHSL 2024 Notification PDF
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
Correct Answer: 7 hours
Solution :
Downstream speed of a boat = 25 km/hr
Distance travelled downstream = 100 km
$\therefore$ Time taken to travel downstream = $\frac{100}{25}$ = 4 hours
Speed of a stream = 3 km/hr
The upstream speed of the boat = 25 – (2 × 3) = 19 km/hr
Distance travelled upstream = 57 km
$\therefore$ Time taken to travel upstream = $\frac{57}{19}$ = 3 hours
Total time taken = 4 + 3 = 7 hours
Hence, the correct answer is 7 hours.
Related Questions
Know More about
Staff Selection Commission Combined High ...
Result | Eligibility | Application | Admit Card | Answer Key | Preparation Tips | Cutoff
Get Updates Brochure
Your Staff Selection Commission Combined Higher Secondary Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Trending Articles around SSC CHSL
