3 39 persons can repair a road in 12 days working 5 hours per day. In how many days will 30 persons working 6 hours per day complete the work?
4 if 15 bottles of water are needed for seven men for two days, how many bottles are required for four men
for seven days?
Share
Answer:
3)13 days
4)30 bottles
Step-by-step explanation:
3)
we know,
Work=men*hours*days
Given
39 persons can repair a road in 12 days working 5 hours per day.
39*12*5
In how many days will 30 persons working 6 hours per day complete the work?
let x be days
30*6*x
if the work is same then,
39*12*5=30*6*x
x=13 days
4)Given,
if 15 bottles of water are needed for seven men for two days,
7 men*2 days=15 bottles
how many bottles are required for four men
for seven days?
let x be bottles
4 men*7 days=x
so,
7*2=15
4*7=x
by cross multiplication we get
x=30