Question

Which of the following options is/are correct?

• A. 4000 m = 40 km
• B. 4000 m = 4 km
• C. 4000 m = 400km
• D. 4000 m = 0.4 km

Answer 1

Answer: (B), (C)

The correct options are
B 4000 m = 4 km
C 4000 m = 400km

We know that, 1000 m = 1 km and 100 cm = 1 m
Checking all the options,
a) 4000 m = 4 km $\ne$ 40 km
b) 4000 m = 4 km
c) 400 cm = 4 m
d) 400 cm = 4 m $\ne$ 0.4 m

Therefore, option (b) and (c) are correct.