Mensah is 5 years old and joyce is thrice as old as mensa...
Mensah is 5 years old and joyce is thrice as old as mensah. In how many years will joyce be twice as old as Mensah?
3 years
10 years
5 years
15 years
Correct answer is C
Mensah’s age is 5. Thus,
Joyce’s age is 15 (5*3=15)
The difference between their ages is 10 (15–5=10)
As we ought to find how many years Joyce’s age will be twice of Mensah’s age, we should write down the following :
15+X=2*(5+X)
15+X=10+2X lets add (-10-X) to both sides of the equation and
15+X-10-X = 10+2X-10-X
5=X —-> X=5
After 5 years Joyce’s age will be 20 (15+5=20)
After 5 years Mensah’s age will be 10 (5+5=10)
After 5 years Joyce will be twice as old as Mensah (10*2=20)
The chord ST of a circle is equal to the radius, r, of the circle. Find the length of arc ST. ...
If O is the centre of the circle in the figure, find the value of x ...
What is the value of 3 in the number 42.7531?...
In the diagram, TX is perpendicular to UW, |UX| = 1cm and |TX| = |WX| = \(\sqrt{3}\)cm. Find UTW...
In the diagram above, AO is perpendicular to OB. Find x...
Height(cm) 160 161 162 163 164 165 No. of players 4 6 3 7 8 9 the ...