To Find,
length of boat in scale drawing.
Given,
scale: 1/20
real life length of boat: 150m.
In the ratio 1:20, 1 denotes the measurement on the scale drawing and 20 denotes the measurement in real life.
let the scale measurement of boat be x.
comparing the given data,
1/20 = x/150
singling out x in RHS, we get:
x= 1/20 * 150
solving the equation, we get:
7.5
Therefore, the scale drawing length of the boat is 7.5 units.