IDNLearn.com: Your one-stop destination for finding reliable answers. Discover comprehensive answers to your questions from our community of experienced professionals.
Answer:
20 mins
Explanation:
To go 90 km it takes =60 mins(1 hr)
" " 1 km it takes =60/90 mins
" " 30 km it takes =60/90 multiplied by 30
= 20 mins