GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Ratio - Explained

The video tutorial explains how to solve a ratio problem involving a piece of string 153 cm long, divided into three parts in the ratio of 4:2:3. The instructor demonstrates how to add the ratios, divide the total length by the sum of the ratios, and calculate each part's length. The solution is finalized by ordering the lengths and discussing the marks awarded for each step.

What is the total length of the string Sandra has?

• 153 cm

• 100 cm

• 200 cm

• 120 cm

How many equal parts is the string divided into based on the ratio?

• 3

• 12

• 9

• 6

What is the length of the piece corresponding to the ratio part '4'?

• 17 cm

• 68 cm

• 51 cm

• 34 cm

In what order should the lengths be written?

• 68, 34, 51

• 34, 68, 51

• 51, 34, 68

• 68, 51, 34

How many marks are awarded for correctly solving the ratio question?

• 1 mark

• 2 marks

• 3 marks

• 4 marks