Dive into the world of knowledge and get your queries resolved at IDNLearn.com. Join our community to receive prompt, thorough responses from knowledgeable experts.
Answer:
distance covered in 2 hours = 80 km
distance covered in 1 hour = 80÷2 = 40 km
distance covered in 7/2 hours = 40 × 7/2
= 140 km
(3 1/2hours = 7/2 hours)