A) 1/2 [h]=.........[s] B) 25 [km]=........[m] C) 30 [dag]=......[kg]=.........[g] D) 2,5 [doby]=........[h]=......[s] PLISSSSSSSSS POMOCY SZYBKO

A. 1/2 h = 30 min = 30 * 60 = 1800 s. B. 1 km = 1000 m  25 km = 25000 m C. 30 dag = 0.3 kg = 300 g D. 2,5 doby = 60h  = 216000 s.

a)1/2h= 1800s b)25km= 25000m c)30dag= 0,3kg= 300g d)2,5doby= 60h= 216000s