Question

A typist uses a sheet measuring 20 cm by 30 cm length wise. If a margin of 2 cm is left on each side and a 3 cm margin on top and bottom, then percent of the page used for typing is:

• A. 40
• B. 60
• C. 64
• D. 72
• E. 89

Answer 1

The correct option is C

64

Area of the sheet = (20 $\times$ 30) cm${}^2$ = 600 cm${}^2$

Area used for typing = [(20 -- 4) $\times$ (30 -- 6)] cm${}^2$ = 384 cm${}^2$

$\therefore$Required percentage = $\left(\frac{384}{600}\times 100\right)\%=64\%$