Question 9 - Figure it out - Page 12, 13, 14 - Chapter 1 Class 8 - Fractions in Disguise (Ganita Prakash II)

Transcript

Question 9 Workers in a coffee plantation take 18 days to pick coffee berries in 20% of the plantation. How many days will they take to complete the picking work for the entire plantation, assuming the rate of work stays the same? Why is this assumption necessary?Let’s try making a bar diagram of this So, we know that 20% of Total = 18 days We need to find number of days will they take to complete the picking work for the entire plantation Thus, we need to find 100% of Number of days Finding total Given that 20% of total = 18 days 20% × Total = 18 days 20/100 × Total = 18 days 1/5 × Total = 18 days Total = 18 × 5 Total = 90 days Thus, it takes 90 days to complete the work Our next question is Why assume the rate stays the same? Because if workers get tired or the weather changes, they might pick slower or faster, changing the time needed.