Question

A milkman has 7 L of milk. If each house requires 750 mL of milk, he can supply milk to ____ houses at maximum.

• A. 9
• B. 8
• C. 10
• D. 7

Answer 1

The correct option is A 9

Quantity of milk with the milkman
= 7 L
= 7 $\times$ 1000 (1 L = 1000 mL)
= 7000 mL
Quantity of milk that the milkman needs to supply to each house = 750 mL
750 mL when added 4 times becomes 3000 mL, so from 3000 mL 4 houses can be supplied milk.
Hence we can write,
7000 mL = 3000 mL + 3000 mL + 1000 mL
From 3000 mL 4 houses can be supplied milk.
From the last 1000 mL, only 1 house can be supplied milk, and 250 mL of milk will be left out.
Total number of houses which got the milk = 4 + 4 + 1
= 9