Disha cycles to her school ct an average speed of 12 km/hr. It takes her 20 minutes
to reach the school. If she wants to reach her school in 15 minutes, what should be
her average speed?
If 15 men can repair a road in 24 days, then how long will it take nine men to
repair the same road?
If 30 goats can graze a field in 15 days, then how many goats will graze the same
field in 10 days?
Man with a work force of 420 men can complete a work of construction
Answers
Answer:
1.
initial time = 20 min. = 1/3 hr
distance of her school = speed×time = 12×1/3 = 4 km.
if she wants to reach school in 15 min. or 1/4hr than she will have to be in speed =
distance / time = 4/1/4 = 16
2. 15 men repair the road in 24 days=15*24.
9 men repair the road =15*24/9
40 days
3. In 15 days number of goats can graze= 30
In 1 day number of goats can graze= 30×15=450
In 10 days number of goats can graze= 450/10= 45
45 goats will graze ....
4. Let work to be done be x
Time taken by 420 persons to complete the work. x= 9 months
x= 420×9 = 3780
People required to complete the work in 9 months= x÷7= 3780÷ 7
3780÷7 = 540
Therefore, the contractor had to employ 540 people more to complete the job.
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Step-by-step explanation:
here is your answer
initial time = 20min. = 1/3 hr
distance of her school = speed×time = 12×1/3 = 4km.
if she wants to reach school in 15min. or 1/4hr than she will have to be in speed =
distance / time = 4/1/4 = 16km/hr.