A boatman can row 96 km downstream in 8 hr. If the speed of the current is 4 km/hr, then find in what time will be able to cover 8 km upstream?

Question

নিচের অপশন গুলা দেখুন

• 6 hr
• 1 hr
• 4 hr
• 2 hr

Answer 1

সঠিক উত্তর হচ্ছে: op 2 hr

ব্যাখ্যা:

Speed downstream
= 96/8 = 12 kmph
Speed of current = 4 km/hr
Speed of the boatman in still water = 12-4 = 8 kmph
Speed upstream = 8-4 = 4 kmph
Time taken to cover 8 km upstream
=8/4 = 2 hours