Sagot :
given:
rate of Elle =1/3
rate of Elle =1/5
req'd:
t=?
formula is:
work = rate x time
work done = 1 work so
1 = 1/3t + 1/5t
t = 1.875 hrs
rate of Elle =1/3
rate of Elle =1/5
req'd:
t=?
formula is:
work = rate x time
work done = 1 work so
1 = 1/3t + 1/5t
t = 1.875 hrs