A dog takes 3 leaps for every 5 leaps of a hare. If one leap of a dog is equal to 3 leap of the hare then find the ratio of the speed of the dog to that of the hare is :

A 8 : 5

B 9 : 7

C 9 : 5

D 8 : 7

Solution

Correct Answer: Option C

এখানে,
খরগোশের ৩ লাফ = কুকুরের ১ লাফ
∴  "         ১   "   =    "      ১/৩ "
∴  "         ৫   "   =    "      ৫/৩ "

তাহলে,
কুকুরের গতিবেগ ঃ খরগোশের গতিবেগ
= ৩ ঃ ৫/৩
= ৯ ঃ ৫ 

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