Question

Manoj wants to paste wallpaper on wall of
his room. The wall is 4 m 50 cm in length and
3 m 50 cm in height. But the wall should be
covered completely only by square pieces
of wallpaper having same size. What is
the number of maximum sized wallpapers
needed to cover the wall?
(a) 8
(b) 15.75 (c) 63
(d) 12​

Answer 1

Answer:

Wall can be covered only by using square sized wallpaper pieces.

Different sized squares are not allowed.

Length = 4 m 50 cm = 450 cm ; Height = 3 m 50 cm = 350 cm

Maximum square size of possible means HCF of 350 and 450

We can see that 350 and 450 can be divided by 50.

On dividing by 50, we get 7 and 9.

Since we cannot divide further, HCF = 50 = size of side of square 

number of squares= wall area / square area

= 450 × 350/ 50×50

= 63

answer is option (c).

hope this helped.❤