A, completes a job in 20 minutes and B does so in 30 minutes. if they do same job together how much time will they take??? kindly explain its procedure... only answer is not required...
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1
time a completes his job = 20 mins
time b completes his job= 30 mins
therefore time take together to complete the work = 15
time b completes his job= 30 mins
therefore time take together to complete the work = 15
getxessp7c4dj:
it is not so simple... both person do separately then takes minimum 20 min by one person... but doing same work together... it must be less than 15...
No they take time 12min
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well it right.. but I didn't understand why 1/20 & 1/30 is used... mean what is meant by 1.
It is a formula
In which class do you read?
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