Question

full solution with basic .
I will mark brainlist.
Help please . ​

Answer 1

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Let speed of X = x m/min

speed of Y = y m/min

Time X take to reach B = t min .

so, Y take = (t+8) min.

Let distance b/w Point A & B = D

A/q, Now,

tx = (t+8)y = D ----------- (1)

3x + 3y = D ------------(2)

putting value y in equation (1) we get,

3x +3(tx/(t+8)) = tx

3+(3t/(t+8)) = t

(3t+8)+3t = t²+8t

t²+2t-24 = 0

t²+6t-4t-24 = 0

(t+6)-4(t+6) = 0

t = 4 min (Ans)

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Answer 2

Answer:

t = 4 min

Step-by-step explanation:

Let speed of X = x m/min

speed of Y = y m/min

Time X take to reach B = t min .

so, Y take = (t+8) min.

Let distance b/w Point A & B = D

A/q, Now,

tx = (t+8)y = D ----------- (1)

tx = (t+8)y = D ----------- (1)3x + 3y = D ------------(2)

putting value y in equation (1) we get,

3x +3(tx/(t+8)) = tx

3+(3t/(t+8)) = t

(3t+8)+3t = t²+8t

t²+2t-24 = 0

t²+6t-4t-24 = 0

(t+6)-4(t+6) = 0

t = 4 min