In an organisation material, labour and maintenance cost are in the ratio of…

Solution: Use the ratio to find the value of one part and then the total cost.

Let material, labour and maintenance costs be 4x, 6x and 7x respectively.

• Given material cost 4x = 100, so one part x = 100 ÷ 4 = 25.

• Total parts = 4 + 6 + 7 = 17, so total cost = 17 × x = 17 × 25 = 425.

Answer: 425