First, we need to find out how many 5 Pence coins are required, in order to equal £5.
There are 100 Pence in £1, so there are 500 Pence in £5.
500 Pence / 5 Pence = 100 Coins
100 Coins * 3 Grams = 300 Grams
The answer is in Kilograms, so we'll need to use a conversion ratio.
1000 Grams = 1 Kilogram, so, 300 Grams = .3 Kilograms