5 pumps are required to fill a tank in 1\(\frac12\) hours. How many pu

1.	5 pumps are required to fill a tank in 1\(\frac12\) hours. How many pumps of the same type are used to fill the tank in half an hour.
Answer» Number of pumps and time to fill the tanks are in inverse proportion. ⇒ x₁y₁ = x₂ y₂ ⇒ 5 × 1\(\frac12\) = x x 1\(\frac12\) ⇒ 5 × \(\frac32\) = x x \(\frac12\) ⇒ x = 5 × 3 = 15 ∴ Number of pumps required = 15

5 pumps are required to fill a tank in 1\(\frac12\) hours. How many pumps of the same type are used to fill the tank in half an hour.

Answer»

Number of pumps and time to fill the tanks are in inverse proportion.

⇒ x₁y₁ = x₂ y₂

⇒ 5 × 1\(\frac12\) = x x 1\(\frac12\)

⇒ 5 × \(\frac32\) = x x \(\frac12\)

⇒ x = 5 × 3 = 15

∴ Number of pumps required = 15