A construction kit contains short rods and long rods with a combined total length of 1200 cm.
Each short rod is 20 cm long and each long rod is 50 cm long.
The ratio
number of short rods : number of long rods=5:4 \text{number of short rods : number of long rods} = 5 : 4 number of short rods : number of long rods=5:4Work out how many long rods are in the kit.
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