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alina1380 [7]
3 years ago
15

Banu is 20 years older than binu. In 5 years, Banu will be twice as old as binu. Find their present age.

Mathematics
2 answers:
Katarina [22]3 years ago
3 0

Answer:

i think Banu is 40 and Binu is 20

Step-by-step explanation:

if Banu was 35 and Binu was 15, 5 years go by Banu is 40 so still 20 years older and Binu is 20, Binu is half the age of Banu.

natima [27]3 years ago
3 0
ANSWER:

Banu's present age = 45
Binu's present age = 25

Banu's present age is 45 years old while Binu's present age is 25 years old.

STEP-BY-STEP EXPLANATION:

We will be using simultaneous equations to solve this problem.

Let's first establish the two equations we will be using to solve this problem.

Let Banu's present age = x

Let Binu's present age = y

Equation No. 1 -

x = y + 20

Equation No. 2 -

x + 5 = 2y

To begin with, as ( x ) is already the subject in the first equation and it is already in its simplest form, we will substitute the value of ( x ) given from the first equation into the second equation to solve for ( y ) accordingly.

Equation No. 2 -

x + 5 = 2y

( y + 20 ) + 5 = 2y

y + 25 = 2y

y - 2y = - 25

- y = - 25

y = 25

From this, we will substitute the value of ( y ) from the second equation into the first equation to solve for ( x ) accordingly.

Equation No. 1 -

x = y + 20

x = ( 25 ) + 20

x = 45
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2 years ago
Help is needed please!
Schach [20]

The distance travelled is 10 m

The velocity gained at the end of the time is 2 m/s

<h3>Motion</h3>

From the question, we are to determine distance travelled and the velocity gained

From one of the equations of motion for <u>linear motion</u>, we have that

S = ut + 1/2at²

Where S is the distance

u is the initial velocity

t is the time taken

and a is the acceleration

First, we will calculate the acceleration

Using the formula,

F = ma

Where F is the force

m is the mass

and a is the acceleration

∴ a = F/m

Where F is the force

and a is the acceleration

From the given information,

F = 50 N

m = 250 kg

Putting the parameters into the equation,

a =  50/250

a = 0.2 m/s²

Thus,

From the information,

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S = 0(t) + 1/2(0.2)(10)²

S = 10 m

Hence, the distance travelled is 10 m

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Using the formula,

v = u + at

Where v is the velocity

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Hence, the velocity gained at the end of the time is 2 m/s

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