Question

An irregular figure occupies 15 $c{m}^2$ on a grid sheet. It covers 12 complete grids, 3 less than half grids and some grids more than half. If each grid occupies 1 $c{m}^2$ then how many grids are covered more than half by the figure?

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is C 3

Given,
Space occupied by each grid
= 1 $c{m}^2$

Number of complete grids occupied
= 12

And, number of less than half grids occupied
= 3

Area
= Number of complete grids occupied x 1 + Number of grids more than half occupied x 1 + number of less than half grids occupied x 0

Area = 12 × 1 + Number of grids more than half occupied × 1 + 3 × 0

15 $c{m}^2$ = 12 × 1 + Number of grids more than half occupied × 1 + 3 × 0

Number of grids more than half occupied = 3