### Bryan Yeo's answer to Gamin's Primary 6 Maths Speed Singapore question.

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Note:increased speed->Usual speed+30km/h)->2hours

Usual speed->2 and 3/4hours

So,30km/h x2 hours is the difference

in the distance of the 2 speeds when

The increased speed have reached(2h).

Usual speed takes 3/4hour to cover

A distance of 60km so it is (60x4/3)km/h

Which is equal to 80km/h.

45 minutes=3/4hours.

Usual speed->2 and 3/4hours

So,30km/h x2 hours is the difference

in the distance of the 2 speeds when

The increased speed have reached(2h).

Usual speed takes 3/4hour to cover

A distance of 60km so it is (60x4/3)km/h

Which is equal to 80km/h.

45 minutes=3/4hours.

Date Posted:
2 years ago