alleryએક બાઇક બે સરખા અંતર 40 કિમી/કલાક અને 60 કિમી/કલાકની ઝડપે કાપે છે. બંને અંતર પર તેની સરેરાશ ઝડપ કેટલી?
A50 કિમી/કલાક
B45 કિમી/કલાક
C48 કિમી/કલાક
D52 કિમી/કલાક
Answer & Solution
Correct answer: C. 48 કિમી/કલાક
સરખા અંતર માટે સરેરાશ 2ab/(a+b) = 2 x 40 x 60 / 100 = 48 કિમી/કલાક થાય છે.
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