Tapas works twice as fast as Mihir. If both of them together

Home » Aptitude » Time and Work » Question

Tapas works twice as fast as Mihir. If both of them together complete a work in 12 days, Tapas alone can complete it in

1. 15 days
2. 18 days
3. 20 days
4. 24 days

Correct Option: B

Using Rule 2,
If Tapas alone takes x days to complete the work, then

=	1	+	1	=	1
	x		2x		12

⇒	2 + 1	=	1
	2x		12

⇒ 2x = 36
⇒ x = 18 days