12 : 15 :: 6 : N

N = ?

(a)  

4 : N :: N : 16

N = ?

(a)  

32 : 48 :: N : 3

N = ?

(a)  

If 15 plumbers can fix the village waterlinss in 3 hours, how many hours would it take if there were only 9 plumbers?

Write your answer with the appropriate unit.

(a)  

A man 7 ft tall casts a shadow 12 ft long on the ground. A tree beside him casts a 36 ft long shadow.

How tall is the said tree?

Write your answer with the appropriate unit.

(a)  

A naval fleet is consist of aircraft carrier, corvettes and destroyers in ratio

1 : 6 : 7.

How many corvettes will be there if there were 28 destroyers?

Write the number only.

(a)  

4 excavators can dig 30,000m³ of soil within 6 hours. How long will it take for 6 excavators to dig same amount of soil?

Write the number of hours only.

(a)  

A 56-watthour battery can power a laptop for 7 hours. How long can a laptop last if it's powered by a 96-watthour battery?

Write the number of hours only.

(a)  

N : 25 :: 16 N

N = ?

(a)