Hi Nakul
I feel there is some language/data problem with both the questions.
1) It can be easily inferred that right triangle under consideration is 30-60-90 triangle, so all the sides lengths can be found in one variable only and then we can easily compare the ratio of speeds of Mrinalini and Neha to get the variable part.
2) Again there is bit confusion in language. Half an hour mentioned is the time taken by the horse-cart and not motorist. After this , I believe, problem becomes a cake-walk. Answer is simply = 30 + (20/2) = 40 minutes.
Kamal Lohia |