Swapna J. answered 03/23/21
passionate in teaching math using tools and games and techniques
4 sec -------------------------10 cm
5 sec ------------------------- ?
so the distance is proportionate to time at a constant speed
10/ 4 = ?/5
to find ho many cm in 5 sec ... do cross multiplication
= (10x5)/ 4 = 50/4 = 25/2 = 12.5 cm or 12 and 1/2 cm