Explore Westonci.ca, the leading Q&A site where experts provide accurate and helpful answers to all your questions. Get the answers you need quickly and accurately from a dedicated community of experts on our Q&A platform. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

Mike can cut a 40 foot by 20 foot yard with a push mower in 25 minutes. At this rate, how many more minutes would it take him to cut a 40 foot by 30 foot yard?

Sagot :

area of the yard is  40 .20  =  800sq ft
time taken = 25 mins
time taken to mow 1sq ft  =      25/800 mins
time taken to mow  40 .30 =1200sq ft  =      ( 25 .1200)/800 =    371/2 mins
thus the extra time  taken will be      371/2-25 =    121/2 mins