alleryપ્રવાહની દિશામાં ઝડપ 18 કિમી/કલાક અને પ્રવાહની સામેની દિશામાં ઝડપ 10 કિમી/કલાક હોય, તો નદીના પ્રવાહની ઝડપ કેટલી હશે?
A2 કિમી/કલાક
B8 કિમી/કલાક
C14 કિમી/કલાક
D4 કિમી/કલાક
Answer & Solution
Correct answer: D. 4 કિમી/કલાક
પ્રવાહની ઝડપ એ બંનેના તફાવતથી અડધી છે, (18 - 10) / 2 = 4 કિમી/કલાક.
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