Allied & ICAR Exam Bank • ALLIED_2155 NAT • 2 Marks

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

A boat takes twice as long to row upstream as to row downstream for the same distance in a river. If the speed of the current is 4 km/h, the speed of the boat in still water in km/h is:

Answer Key:

12

Step-by-Step Solution & Explanation

Time ratio: $t_u / t_d = 2 \implies v_d / v_u = 2 \implies (v+4)/(v-4) = 2 \implies v+4 = 2v-8 \implies v = 12$ km/h.
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