The wight of 72 books is 9 kg. What will be the wight of 40 such books? Share with your friends Share 1 Varun.Rawat answered this Weight of 72 books = 9 kgWeight of 1 book = 972 kg = 18 kgWeight of 40 books = 18×40 kg = 5 kg 0 View Full Answer Ananya Gupta answered this weight of 72 books=9 kg weight of 1 book=72/9=8 weight of 40 such books=40*8=5 kg 2 Sayan Nandy answered this 320kg 0 Rachit answered this The weight of 40 books is 5 kg 3 Neelansh Tiwari answered this 320 kg -2 Diya Shukla answered this 72:40::9:x x= 40*9/72 = 360/72 =5 kg so the weight of 40 books is 5kg. 1 Saatwik Murotia answered this Its 5 kg not 320 kg Sayan. -1