i don't know if i'm posting on right place in the forum or not.. i've a question..
A curved section of road is replaced with a straight highway. Road becomes 20% shorter and the speed can be increased from 80 km/h to 100 km/h..
how changed driving time in percent?
(answer is 36% decrese in driving time...but i don't know how it's solved...)
please answer me as soon as possoble...