A van has a braking distance of 20 m. Its mass increases by 25% when it is loaded. It brakes from the same speed with the same constant braking force. What is the braking distance of the loaded van?
16 m16\ \mathrm{m}16 m
20 m20\ \mathrm{m}20 m
25 m25\ \mathrm{m}25 m
31.25 m31.25\ \mathrm{m}31.25 m