ans: 120°
According to the question,
y + z = 180° ……..(i)
and y – z = 60° ……..(ii)
(i) + (iI)
2y = 240°
y = 120°
Again, y° = S° = 120°
=>s°= x° = 120°
ans: A gcts Tk 2250; B gets TK. 1500 & C gets Tk TK. 750.
In 10 days A does 1 work
In 1 day A does $\frac{1}{10}$ the work
In 5 days A does $\frac{5}{10}$ = $\frac{1}{2}$ of work
Again, In 15 days B does 1 work
In 1 day B does $\frac{1}{15}$ of the work
In 5 days B does $\frac{3}{15}$ = $\frac{1}{3}$ of the work
In 5 day both A & B together do = ( $\frac{1}{2}$+ $\frac{1}{3}$) = $\frac{5}{6}$ Work
Rest =(1- $\frac{5}{6}$) = $\frac{1}{6}$ work
In 2 day C docs $\frac{1}{6}$ of work
A:B:C:= $\frac{1}{2}$: $\frac{1}{3}$: $\frac{1}{6}$ =3:2:1
A gets Tk = $\frac{3}{6}$x 4500 = TK. 2250
B gets Tk = $\frac{2}{6}$x 4500 = TK. 1500
C gets TK = $\frac{1}{6}$x 4500 = TK. 750
ans: TK. 762.30
Principal = Tk. 1260,
Rate of interest, r = 10%
Time = 2 years
We know,
A = P(I + r)” [ where, A = Amount = P + I]
=> A =1260 (1+$\frac{1}{10})^{2}$
=> A = 1260 x $\frac{121}{100}$
A = 1524.60.
Since the amount has to be paid in two equal annual installment.
So the annual installment = (1524.60 $\div$ 2) = TK. 762.30
