Explanation:
20 men can do 1 W in 36 days
=> 20 men can do 1/36 W in 1 day
=> 10 men can do 1/72 W in 1 day.
30 girls can do 1W in 36 days
=> 30 girls can do 1/36 W in 1 day
=> 12 girls can do 1/90 W in 1 day.
Together 10 men and 12 girls can do 1/72 + 1/90 W in 1 day
= 9/360 = 1/40 W in 1 day.
Therefore they need 40 days to do the piece of work.
The type of PFD suitable for children under 10 years of age should be:
a type 1 PFD
There are four types of PFD and the Type 1 should be used by children under 10 years of age. Type 1 PFD's are intended to be used in water activities where early rescue may be expected. Children under 10 years of age must wear a USCG approved PFD when on board a boat.
A.
All dangerous drugs are illegal.
Tobacco is legal over a certain age
<span>UCR is an acronym for uniform crime report.
The report is a joint collaborative effort to gather evidence of crime across cities of the united states of America. These reports are supported by the police, civil organisations and other crime fighting agencies in the United States and they are public annually by the Federal Bureau of Investigation. The statement that would be true if all the options were given in the question above would be related to crime statistics and crime data</span>
