alleryશાંત પાણીમાં 15 km/h ની ઝડપ ધરાવતી હોડી 5 km/h ની ઝડપવાળા પ્રવાહની સાથે 40 km જાય છે અને પાછી આવે છે. કુલ સમય કેટલો?
A8 કલાક
B7 કલાક
C5 કલાક
D6 કલાક
Answer & Solution
Correct answer: D. 6 કલાક
પ્રવાહની દિશામાં 40 / 20 = 2 કલાક અને પ્રવાહની વિરુદ્ધ દિશામાં 40 / 10 = 4 કલાક, કુલ 6 કલાક.
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