Question

What is the length l2,if total length (l) is 2.75 metre and l1:l2=2:3?

Answer 1

Answer: 1.65 Meter

Step-by-step explanation:

l = 2.75 = l1 + l2 and l1:l2=2:3

2.75/5  =  0.55

l1 =  0.55 * 2 = 1.1

l2 = 0.55 * 3 = 1.65

Answer 2

Answer:

The length $l_2$ = 1.65m

Step-by-step explanation:

Given,

The total length (l) = 2.75m

$l_1: l_2 = 2:3$

To find,

The length $l_2$

Solution:

Since the total length is 'l', we have

l =$l_1+ l_2$

Since the total length is 2.75 we have

$l_1+ l_2$  = 2.75----------------(1)

Since $l_1: l_2 = 2:3$, we have

$l_1$ = 2k and $l_2$ =  3k for some k

Substitute the value of $l_1$ = 2k and $l_2$ =  3k in equation (1) we get

2k +3k = 2.75

5k = 2.75

k = $\frac{2.75}{5}$ = 0.55

k = 0.55

Substituting the value of k, we get length $l_2$ =  3k

= 3×0.55

= 1.65

∴ The length $l_2$ = 1.65m

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