Answer:
ans: 20.
Explanation:
In 20 days the work is completed by = 60 workers
In 1 days the work is completed by = 60 x 20 workers
In 15 days the work is completed by =$\frac{20\times 60}{15}$ = 80 workers
Extra worker needed = 80 – 60 = 20
Answer:
ans: He purchased 30 books.
Explanation:
Given, Retail price of a book = 50 Tk.
At 20% discount, purchase price of a book = 50 -50 x 20% = 40Tk.
Saved amount per book = 50 — 40 = 1O Tk.
Now 1OTk. is saved in =1 book
Now 300 TK is saved in =$\frac{1\times 300}{10}$= 30 book
Answer:
1
Explanation:
