Question

a pipe can fill 4 water tanks in 2 hours 20 minutes. How long will it take to fill 7 such tanks using the same pipe?​

Answer 1

Answer:

four tanks take 2 hours 20 minutes. (140mins)

seven tanks = x

it's a case of direct proportion

4/140 = 7/x

x = 7×140/4

x = 245 mins

4hrs 5mins ans

Answer 2

Answer:

4 h 5 min

Step-by-step explanation:

4 tanks take 2 hours and 20 minutes or (140mins)

we can solve it in proportion

so let's take seven tanks time as x

so the sum looks like this

4/140 = 7/x

4 * x = 140 * 7

x = 7 * 140 / 4

x = 245

so seven tanks will take 245 mins or 4 h 5 min

Hence, the answer is 4 h 5 min