Q. The mass of a box is 2.3 g. Two gold pieces, each of mass 0.035 g, are placed in it. The total mass of the box and gold pieces is
A) 2.3 g
B) 2.4 g
C) 2.37 g
D) 2.370 g
Explanation
$(2.3 + 0.035 + 0.035)$g=2.37 g But we have to retain only one decimal place. So, the total mass is 2.4 g.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.