discs of radius 4cm are cut out from a rectangular plastic sheet of length 84 cm and width 24 cm. How many complete discs can be cut out? My answer is 40 but the book's answer is 30 so can anyone help me please?

Question

campbell_st · Answer

whats the diameter of the disk...?

when you know that find how many fit on a 24 cm side

and how many fit on an 84cm side

multiply the 2 numbers for the answer

anonymous · Answer

they gave the radius only 
diameter is 8cm

campbell_st · Answer

yep... so how many diameters fit on the side of 24 cm...?

and how many diameters fit on a side of 84 cm...?

anonymous · Answer

3 diameter fit on the side of 24 and 10 on the side of 84?

campbell_st · Answer

so how many discs fit on the sheet of plastic...? just multiply the number on each side

anonymous · Answer

30
thank you btw

campbell_st · Answer

glad to help