9. A can do 1/3 of a work in 5 days and B can do 2/3 of the work in 10 days. In how many days can both A and B together do the work.
Answers
Answer:
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:Add rates of A, , and B, , with LCM of 75.
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:Add rates of A, , and B, , with LCM of 75.COMBINED RATE of A and B:
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:Add rates of A, , and B, , with LCM of 75.COMBINED RATE of A and B:TIME: How many days does it take them, working together, to finish the job?
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:Add rates of A, , and B, , with LCM of 75.COMBINED RATE of A and B:TIME: How many days does it take them, working together, to finish the job?Job = 1
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:Add rates of A, , and B, , with LCM of 75.COMBINED RATE of A and B:TIME: How many days does it take them, working together, to finish the job?Job = 1When work is 1, rate and time are inversely proportional.
This approach looks time-consuming. It isn't. Find and add rates. Work is 1; flip the rate to get the number of days it would take A and B, working together, to finish.RATES: To find rates, use A's rate, in :B's rate:Add rates of A, , and B, , with LCM of 75.COMBINED RATE of A and B:TIME: How many days does it take them, working together, to finish the job?Job = 1When work is 1, rate and time are inversely proportional.Invert the combined rate, , to get the time: days, OR
so you have to insert this formula
I hope you understand
