Renu has to take 3 injections in a day for 3 days. One injection gives 10 mL of the medicine. How much medicine will she need for all 3 days.
A
90 mL
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B
30 mL
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C
50 mL
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D
90 L
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Solution
The correct option is A 90 mL Number of injections per day = 3
Quantity of medicine in one injection = 10 mL
Day total amount of medicine =
3 x 10 mL = 30 mL
Total medicine taken in 3 days =
3 x 30 mL = 90 mL