1. if a car covers 54 km in an hour, how much distance will it cover in 40 minutes?
2. If 40 men can finish a piece of work in 60 days, in how many days will 75 men finish the same work?
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1)=...per hour. What distance will it cover in 3 hours and 20 minutes?
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Atfirst we need to convert 3 hours 20 minutes into minutes i.e. 3×60+20 = 200 minutes
Now simply use the formula of time and distance…
Distance = speed × time
Speed = 54 km per hour i.e. 54 km in 60 minutes
Or in 1 minute 54/ 60 ( as we converted the unit in minutes )
Time = 200 minutes
Now Distance =
54/60 × 200
= 9× 20 ( cancelled out a single zero from 60 and 200 and dividing 54 by 6)
= 180 km
Ans: It will cover 180 km in 3 hours and 20 minutes.
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ANSWER
Suppose 40 men can do a piece of work in x days Then 30 men can do the same work in
30
x×40
days = (x + 6) days
⇒ 4x = 3x + 18 ⇒ x = 18 ∴ 60 men can do the same work in
60
18×40
days = 12 days
Answered By=shreyash ......
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