Explanation

A completes the work in 12 days.

So, A's 1-day work:

1/12

B completes the work in 24 days.

So, B's 1-day work:

1/24

Together, their 1-day work:

1/12 + 1/24  

LCM of 12 and 24 = 24:

 2/24 + 1/24  

= 3/24  

= 1/8  

Therefore, they will complete the whole work in:

8 days

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Last updated by NA on 09-09-2026​

Explanation

Step 1: Time taken for one lap

First car:

5/50=1/10 hour=6 minutes 

Second car:

5/80=1/16 hour=3.75 minutes 

Step 2: Find when they meet at the starting point together

We need the LCM of 6 minutes and 3.75 minutes.

Convert to seconds:

• 6 minutes = 360 seconds 

• 3.75 minutes = 225 seconds 

LCM (360, 225) = 1800 seconds = 30 minutes

So, both cars will return to the starting point together after 30 minutes.

Step 3: Add to starting time

9:00 a.m. + 30 minutes = 9:30 a.m.

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Explanation

For objects moving in opposite directions, relative speed = sum of their speeds.

50 + 100 = 150 km/hour.

Last verified on 02-09-2026

Explanation

Speed = 360 ÷ 4 = 90 km/h

New speed = 90 + 20 = 110 km/h

Time = 360 ÷ 110 = 3.27 hours (approx.).

Verified & Updated

Explanation

Speed = Distance ÷ Time

160 ÷ 3 = 53.33 km/h.

Last verified on 09-07-2026