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Question

If 9 tankers can fire 45 rounds in a shot, then find the number of rounds fired by 45 such tankers in a shot.
  1. 225 rounds
  2. 200 rounds
  3. 100 rounds
  4. 150rounds


Solution

The correct option is A 225 rounds
The number of rounds (R) fired in an hour is directly proportional to the number of tankers (T) used.

R T 

Let the constant of variation be k.
R=kT

Given, when R = 45, T = 9.
So, k=RT =459=5.

Hence, the number of rounds (R) fired by 45 such tankers in a shot = kT = (5)(45) = 225 rounds.

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