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SSC CGL 2025 PYQ — Question 55

SSC CGL - 21 Sep 2025 - Shift 2 • Quantitative Aptitude • Q55

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A boat travels 120 km downstream in 6 hours and 120 km upstream in 10 hours. What is the speed of the boat in still water?

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Correct answer: C

Explanation

The correct answer is option 3 i.e. 16 km/hr.

VB = Speed of the boat in still water

VR = Speed of the water

VB + VR = 1206 120\over6 = 20 km/h

VB - VR = 12010120\over10 = 12 km/h

VB = (20+12)2(20 + 12)\over2 = 32232\over2 = 16 km/h