Medicine is packed in boxes, each weighing 4 kg 500 g. How many such boxes can be loaded in a van which cannot carry beyond 800 kg?

Mass of each box = 4 kg 500 g

= (4 × 1,000 + 500) g

= 4,500 g

Maximum mass the van can carry = 800 kg

= (800 × 1,000) g

= 8,00,000 g

Number of boxes that can be loaded = $\dfrac{\text{Maximum mass}}{\text{Mass of each box}}$

= $\dfrac{8{,}00{,}000}{4{,}500}$

Dividing 8,00,000 by 4,500:

Quotient = 177, remainder = 3,500.

So, the maximum number of boxes that can be loaded is 177 (since 178 boxes would weigh 178 × 4,500 = 8,01,000 g = 801 kg, which is more than 800 kg).

Hence, the number of boxes that can be loaded in the van is 177.