Week 240 (18 March 2022)

Niall and his Dad are decorating a float for the St Patrick’s Day Parade.

They have bought ribbon and green fabric to use.

The length of a roll of ribbon is 30 metres, correct to the nearest half-metre. A piece of length 5.8 metres, correct to the nearest 10 centimetres, is cut from the roll.

Work out the maximum possible length of ribbon left on the roll.

Answer:

Maximum length of ribbon = 30.5m

Shortest length of piece = 5.70m

Therefore, maximum length of ribbon left on role = 30.5 – 5.7 = 24.8m