Question : A man rows upstream 36 km and downstream 48 km taking 6 hours each time. The speed of the current is:
Option 1: 0.5 km/hr
Option 2: 2 km/hr
Option 3: 1 km/hr
Option 4: 1.5 km/hr
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 1 km/hr
Solution : Given: A man rows upstream 36 km and downstream 48 km, taking 6 hours each time. The speed of the current = $\frac{1}{2}\times (\text{rate of downstream}-\text{rate of upstream})$. The rate of upstream is given as $\frac{36}{6}=6$ km/hr The rate of downstream is given as $\frac{48}{6}=8$ km/hr So, the speed of current = $\frac{1}{2}\times(8–6)=\frac{1}{2}\times 2$ = 1 km/hr Hence, the correct answer is 1 km/hr.
Candidates can download this ebook to know all about SSC CGL.
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Question : A boat covers 12 km upstream and 18 km downstream in 3 hours, while it covers 36 km upstream and 24 km downstream in $6\frac{1}{2}$ hours. What is the speed of the current?
Question : A boat moves 25 km upstream and 39 km downstream in 8 hours. It travels 35 km upstream and 52 km downstream in 11 hours. What is the speed of the stream if it travels at a uniform speed?
Question : Dharmendra can row 80 km upstream and 110 km downstream in 13 hours. Also, he can row 60 km upstream and 88 km downstream in 10 hours. What is the speed (in km/hr ) of the current?
Question : To go a distance of 144 km upstream, a rower takes 12 hours while it takes her only 9 hours to row the same distance downstream. What is the speed of the stream?
Question : A boat goes 20 km upstream and 44 km downstream in 8 hours. In 5 hours, it goes 15 km upstream and 22 km downstream. Determine the speed of the boat in still water.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile