Question

radu pleaca in vacanta. in prima zi a parcurs 3pe10 din drum, a doua zi 4pe7 din drumul ramas,iar a treia zi a parcurs cei 450 km ramasi pana la destinatie. afla lungimea drumului parcurs de radu pana la destinatie​

Answer 1

drum are 10/10 părți.

10/10-3/10(prima zi )=7/10raman de parcurs

4/7×10/10=4/10 parcurge

450km=3/10

/---/---/---/---/--/---/---/--/---/---/

/---/---/---/ | (3/10)

....4/7=4/10 ( din rest ) ....[ 450 km ]

450:3=150 un segment

1 zi | 150×3 | = | 450 |

2 zi | 150×4 | = | 600 |

3 zi | 150×3 | = | 450 |
(450+450)+600=900+600=1500