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lf a man walks 3/5th of his original speed and gets 12 minutes late. What is his usual speed?

In this question since distance is constant, speed and time will be inversely proportional. So if speed decrease by 2/5 then the time increases by 2/5. Hence 2/5*T=12
T=12*5/2=30 minutes
what is wrong with this approach?

I have a doubt about profit and loss daily test 20 question 3? Please help.

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what is elementary mathematics?

how to do parajumbles

I m. Not able to. Acess my rbi. Mains package

the report ended on a .....note

8 litres are drawn from a cask full of wine and is then filled with water.This operation is performed three more times.the ratio of the quantity of wine now left in cask to that of the water is 16:65.How much wine did the cask hold originally?

Can u pls reduce the time of 15 mins to 5 mins or even 3 mins for the daily 5 qn set uploaded

I have paid but not got the test series available transaction ID 192617659