Question

The length and breadth of a room are in the
ratio 7: 6. Find the length if the breadth is
12 m.​

Answer 1

Answer:

The length, breadth and height of a room are in the ratio 7:5:4

Length l=7x

Breadth b=5x

Height h=4x

According to the given question,

Area of 4 walls =2×(l+b)×h

Initial Area

A

1

=2×(7x+5x)×4x=96x

2

New dimensions

Length l=7x+1

Breadth b=5x+1

Height h=4x+1

New Area

A

2

=2×(7x+1+5x+1)×(4x+1)=96x

2

+124

96x

2

+40x+4=96x

2

+124

40x=120

x=3,

Hence, Dimensions of the room are

Length l=7x=21m

Breadth b=5x=15m

Height h=4x=12m

Answer 2

Answer:

14m

Explanation:

Let length be x and breath be y

7:6 = length: breath

7/6 = x/12

6x = 84

x = 14

Hence, length is equal to 14m...

Pls mark it as brainliest and follow me....