Latest REVENUE OFFICER Aptitude Question SOLUTION: 20 men can cut 30 trees in 4h. If 4 men leave the job. How many trees will be cut in 12h? (a)72 (b)80 (c)68 (d)79

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(#M40036097) REVENUE OFFICER Numerical Ability question time and work Keep an EYE

20 men can cut 30 trees in 4h. If 4 men leave the job. How many trees will be cut in 12h?

(a)72
(b)80
(c)68
(d)79

Asked In REVENUE OFFICER Janavi (10 years ago)

Unsolved Read Solution (5)

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Read Solution (5) :

Saraswathy  (10 years ago)

20 men --> 30 trees --> 4 hrs
20 men's 1 hr work = 1/4 [ie 1/4 of 30 trees]
So in 1 hr 20 men can cut 30*1/4 = 15/2 trees
20 men --> 15/2 trees ---> 1 hr
1 man --> x
x = 1/20 * 15/2 => 3/8 tree
So 1 man can cut 3/8 tree in 1 hr

Now 4 men left the job... Remaining no. of men = (20-4) = 16
1 man --> 3/8 tree
16 men --> x trees
x = 16*3/8 => x=6
So 16 men can cut 6 trees in 1 hr
1 hr --> 6 trees
12 hr --> x trees
x = 12*6
x=72 trees

Ans : (a) 72 trees

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Devendra Marghade  (9 years ago)

(a) 72

20M-----------30T------4H
20*(4/5)=16M----30T----4*(5/4)=5H
In 5 hours 30 Trees,so in 12 hours, 12*30/5=72 Trees

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Rahul singh  (9 years ago)

30/4=7.5trees in an hr by 20 men
1 men will cut 7.5 /20 trees pr hr
so 16 men will cut (7.5/20)*16tree pr hr
so in 12 hr trees cut = 72 trees
so the ans is a

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senbagapriya  (9 years ago)

a) 72

20M-----------30T------4H
20*(4/5)=16M----30T----4*(5/4)=5H
In 5 hours 30 Trees,so in 12 hours, 12*30/5=72 Trees

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Santosh Yadav  (9 years ago)

simple...30/20=1.5 for 1 men in 4 hour...so 16men*1.5=24
for 12 hour....24*3=72

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