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### Primary 6 Problem Sums/Word Problems - Try FREE

- Speed: Getting there! > Speed Exercise 19 > 2
- Attempting as Guest
- Attempt Mode: Attempt Single Question

**Score :**

(Single Attempt)

**Question
**

The distance between China and Singapore is 2520 km.

Mary flew a plane from China to Singapore at 0900.

At first, she travelled at a speed of 400 km/h for the first 4 hours of the journey.

After that, she increased her speed by 60 km/h for the rest of the journey.

(a) What was her average speed for the whole journey?

(b) What time did she reach Singapore?

*Notes to student:*

*If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12*

The correct answer is :

**420,3**