462. Avtomobil 74 km/h tezlik bilan 4 soat yurib to'xtadi. Bir oz tanaffusdan
so'ng oldingiga qaraganda 10 km/h kam tezlik bilan 2 soat yurdi. Avtomobí
qancha masofa yurgan (7-rasm)?
so'ng oldingiga qaraganda 10 km/h kam tezlik bilan 2 soat yurdi. Avtomobí
qancha masofa yurgan (7-rasm)?
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Ответ:
Masofa 20km
4×(t+3)=10×t
4×t+12=10×t
6×t=12
t=2
S=10+2=20km