यदि 10 पुरुष या 20 लड़के 20 दिनों में 260 चटाइयां बना सकते है 8 पुरुष तथा 4 लड़के 20 दिनों में कितनी चटाइयां बनाएगे ?

Options

A. 260
B. 240
C. 280
D. 520

Answer

a

Explanation

`[(m_(1)xxt_(1)xxd_(1))/(w_(1))=(m_(2)xxt_(2)xxd_(2))/(w_(2))]`
`[(10Mxx20 "days"))/(260 "mats")=(20 B xx20 "days")/(260"mats")]`
10 M =20 B
1 M =2B
`therefore (M)/(B)=(2)/(1)`
` therefore 1 M ` work =2 units /day
1 B work = 1 unit /day
mats made by (8M+4B) in 20 days
`[10Mxx20 "days")/(260 "mats")=((8 M+4B) xx20 "days")/(260"mats")`
`(10xx2xx20"days")/(260m)=(20xx20 "days")/(xm)` aftaer solving ,
x= 260 mats