3.5 days!
Just because they work together, it doesn't mean they'll work twice as fast!
Find the average of the two by adding 3 and 4 to get 7 and then divide by 2 to get 3 and a half hour.
I think. xD This is kind of tricky.
T = 15.70r
time cost (t) = the price of the bag of rice • the number of bags of rice
Number 8 is C 251.2 formula multiply 40*3.14=125.6 125.6*2=251.2
and 9 is C get the area of the rectangle 15*5=75 and now of the circle 3.14*2.5^2=78.5 now divide 78.5/2=39.25 then add 39.25+75=114.3.