JEE PYQ: Mathematics In Physics Question 20
Question 20 - 2019 (09 Apr Shift 2)
The area of a square is 5.29 cm$^2$. The area of 7 such squares taking into account the significant figures is:
(1) 37 cm$^2$
(2) 37.030 cm$^2$
(3) 37.03 cm$^2$
(4) 37.0 cm$^2$
Show Answer
Answer: (4)
Solution
$A = 7 \times 5.29 = 37.03$ cm$^2$ The result should have three significant figures, so $A = 37.0$ cm$^2$