Question

A boy purchases 100 g of vegetables per day. How many kgs of vegetables will be needed for 20 boys(who use the same quantity of vegetables) for 4 weeks?

• A. 40 kgs
• B. 28 kgs
• C. 50 kgs
• D. 56 kgs

Answer 1

The correct option is D 56 kgs

A boy needs 100 g of vegetables per day.
$\therefore$ 20 boys will need 100 × 20 g = 2000 g of vegetables.

$\because 1000g=1kg\Rightarrow 1g=\frac{1}{1000}kg\Rightarrow 2000g=2000\times \frac{1}{1000}kg=2kg$
i.e., 20 boys need 2kgs of vegetables in a day.

1 week = 7 days
$\Rightarrow$4 weeks = 4 × 7 days = 28 days
So, the amount of vegetables needed for 20 boys for 4 weeks is 28 × 2 kg = 56 kg.