Question

Two ships leave their base , 724 km apart. They travel towards each other at speeds equal to 30km/h and 35 km/h, respectively. In how many hours will they be 75 km apart ?

Answer 1

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Total speed = 30km + 35km = 65km

Total distance = 724 - 75 = 649

To find the time,

T = D/S

$\frac{649}{65} = 9.98$

9.98 hours

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Answer 2

Total speed = 30 +35=65

Distance =724-65 =649

T = D ÷ T

=649÷65

= 9.98