HOTS Mathematics Primary 5 Rate

Ravi types at 50 words per minute. His essay has 3 000 words. He starts typing at 10 a.m. and takes a 10-minute break after every 30 minutes of typing. At what time will Ravi finish the essay?

A 11:10 a.m.
B 11:00 a.m.
C 11:20 a.m.
D 11:30 a.m.
Show Worked Solution

Worked Solution

Step 1: Find total typing time. 3 000 ÷ 50 = 60 minutes Step 2: Determine number of breaks. Break after every 30 minutes of typing. 60 minutes of typing → break after the 1st 30 min. After the 2nd 30 min of typing, the essay is finished — no 2nd break needed. Number of breaks = 1 Step 3: Total clock time. 60 min (typing) + 10 min (1 break) = 70 min Step 4: Finish time. 10:00 a.m. + 70 min = 11:10 a.m.

Correct answer: 11:10 a.m.

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