Question

150 identical books have a mass of 30 kg find the mass of 60 such books​

Answer 1

12

Step-by-step explanation:

Let the mass of such 60 books be x

150/30= 60/x

Cross multiply both sides

150 × x= 30×60

150x= 1800

Divide both side by the coefficient of x which is 150

150x/150= 1800/150

x= 1800/150

= 12

Hence the mass of such 60 books is 12kg