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Unitary Method Test

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A car travels 66 kilometers in 2 hours. What is the speed of the car? (click for answer)

Distance traveled by the car in 2 hours = 66 km
Distance traveled by the car in 1 hour = 66/2 = 33 km
Therefore, the speed of the car is 33km/hour.
What is 6% of $300? (click for answer)

Let's take $300 as 100%
100% of the total money = $300
1% of the total money = 300/100
6% of the total money = 300/100 x 6 = $18.
What is the rate of prunes per pound if the cost of 3 pounds of prunes is $12? (click for answer)

Cost of 3 pounds of prunes = $12
Cost of 1 pound of prunes = 12/3 = $4
Therefore, the rate of prunes is $4/pound
If the total salary of 5 men for 10 days is $500 then how many men will be able to earn a sum of $1000 in 4 days? (click for answer)

$500 is the total salary for 5 men working for 10 days
$500/5 is the total salary of 1 man working for 10 days
$500/5 x 1/10 is the total salary for 1 man for 1 day.
$10 is the total salary of 1 man for 1 day.

This can also be written as,

$10 is the salary of 1 day for = 1 man
$40 is the salary of 4 days for = 1 man

$1000 is the salary of 4 days for = 1000 / 40

Thus, $1000 is the salary of 4 days for 25 men.

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