Explanation

Speed = Distance / Time = 600 m / 30 s = 20 m/s

Convert to km/h: 20 × 3.6 = 72 km/h

Last verified on 23-08-2026

Explanation

• Measured length = 250 m
• Standard chain length = 20 m
• Chain is 10 cm longer = 0.10 m
• Actual chain length = 20 + 0.10 = 20.10 m

Formula:

True Length=Measured Length×Actual Chain Length/Standard Chain Length​

Substitute:

=250×20.10/20

​ $$=250\times 1.005$$

=251.25 m

Last updated by NS on 14-8-2026
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Explanation

Rate = 1350 dishes per 1 hour = 60 minutes

In 16 minutes:

Dishes = 1350 × (16 / 60)

= 1350 × 0.2666...

= 360

Last verified on 06-08-2026

Explanation

Speed = 200 km/hr

Time from 12:24 PM to 2:12 PM:

From 12:24 to 1:24 = 1 hour

From 1:24 to 2:12 = 48 minutes

Total time = 1 hour 48 minutes = 1 + 48/60 = 1.8 hours

Distance = Speed × Time

Distance = 200 × 1.8

Distance = 360 km

Last verified on 05-08-2026

Explanation

The hour hand and minute hand coincide once every 65 and 5/11 minutes.

In 12 hours they coincide 11 times. 

They do not coincide at 12:00 at both the start and end, because that would count the same time twice.

Last verified on 03-08-2026