TK 5000
Let, Cost = 100 Tk.
Profit =$(100+\frac{8}{100}x100)-(100-\frac{12}{100}x100)$= 20 Tk.
If profit is 20 Tk. more than the cost price = 100 Tk.
If profit is 1000 Tk. more than the cost price = $\frac{100}{20}x1000$ = 5,000 Tk.
The faster train will take time to cross the slower train 75 seconds or 1 min. and 15 seconds.
Faster train moves more (104 — 80) = 24 km.
24 km. = 24,000 meters and 1 hour = (60 x 60) Seconds.
Moves 24,000 meters in = (60 x 60) Seconds
Moves 500 meters in =$\frac{60x60x500}{24000}$= 75 Seconds
12 days
According to the question
1 Cupboard = 3 benches
5 Cupboard = (3 x 5) = 15 benches
8 Cupboard = (3 x 8) = 24 benches
36 Benches and 5 Cupboards = (36 + 15) = 51 Benches
and 61 benches and 8 Cupboards = 61 + 24 = 85 Benches.
6 Carpenters can make 51 Benches in = 12 days
1 Carpenters can make 1 Benches in =$\frac{12×6}{51}$ days
1 Carpenters can make 85 Benches in =$\frac{12x6x85}{51}$ days
10 Carpenters can make 85 Benches in = $\frac{12x6x85}{51×10}$ = 12 days.
