A typist uses a paper 30 cm times 15 cm He leaves a margin of 2 5 cm at the top and the bottom and 1......

A typist uses a paper 30 cm × 15 cm. He leaves a margin of 2.5 cm at the top and the bottom and 1.25 cm on either side. What percentage of paper area is approximately available for typing?

Total area = (30 × 15) cm² = 450 cm²
Area used = [(30 - 1.25 × 2) × (15 - 2.5 × 2)]
=(27.5 × 10) cm² = 275 cm²
Percentage of area used = [(275/450) × 100]% = 61.1%~60%(approx..)

By: MIRZA SADDAM HUSSAIN