alleryએક હોડી પ્રવાહની દિશામાં 18 કિમી/કલાક અને પ્રવાહની સામેની દિશામાં 10 કિમી/કલાકની ઝડપે ચાલે છે. સ્થિર પાણીમાં તેની ઝડપ કેટલી હશે?
A8 કિમી/કલાક
B14 કિમી/કલાક
C16 કિમી/કલાક
D12 કિમી/કલાક
Answer & Solution
Correct answer: B. 14 કિમી/કલાક
સ્થિર પાણીમાં ઝડપ એ બંનેની સરેરાશ છે, (18 + 10) / 2 = 14 કિમી/કલાક.
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