Question

360 men had provisions for 21 days if 60 more men join them how long will the provisions last​

Answer 1

The answer is -

360*21=7560

So, 7560/60=

126

Answer 2

Men. Days

360. 21

360+60=420 a

let the provision of food be b

Therefore, it is in indirect proportion.

therefore, 360:420::b:21

or, 420×b=360×21

or, b =360×21÷420

Hence b= 18 ddays.