Question

Chandu's father is called the 'young old man' in his village. At 70 years of age, he is fully fit. Do you know his secret? He goes for a walk around the field every morning. Everyday he takes four rounds of Chandu's field.
• What is the total distance he covers?
4 × _________ = _________ m = _________ km

Answer 1

Length of the boundary of Chandu's field = 100 m + 150 m + 100 m + 150 m
= 500 m
∴ Distance covered by Chandu's father in one round = 500 m
Chandu's father takes four rounds of the field every morning.
Distance covered by Chandu's father in four rounds = 4 × 500 m
= 2000 m
Now,
1 km = 1 × 1000 m
∴ 2 km = 2 × 1000 m

Thus, the total distance covered by Chandu's father is 2 km.

∴ Total distance covered = 4 × 500 m = 2000 m = 2 km