Question

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?​

Answer 1

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