Vishal donates blood thrice in 2 years-each time 350 ml. How many litres of blood will he donate in 6 years ?

Answer: Option B

Quantity of blood donated in 2 years
= (350 × 3) ml
= 1050 ml
= 1.05 litres
∴ Quantity of blood donated in 6 years
$$=\left(\frac{1.05}{2}\times 6\right)$$
= 3.15 litres