Question

A rectangular field is 90 m by 70 m . A man walks around it at the rate of 4 km per hour . What time will he take in making 5 rounds ?​

Answer 1

Answer:

24 minutes

Step-by-step explanation:

perimeter = 2(90+70) = 2×160 = 320

total distance covered by man in 5 rounds = 5 × 320 = 1600 meter

speed = 4000 meter per hour

4000 meter ----------------------- 60 min.

1 meter ---------------------------- (60÷4000)

1600 meter ------------------------- (60÷4000) × 1600

= 24 minutes