Question

112 km in 90 min how much distance in 285 min
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Answer 1

Answer: if 90 min= 112 km,

then, 285 min= 285×90

= 25,650 km

Answer 2

Given:

✰ Distance travelled in 90 min = 112 km.

To find:

✠ Distance travelled in 285 min.

Solution:

Let's understand the concept first! First we will assume and consider that the distance travelled in 285 min be x km. Now, we know when the time taken increases, the distance travelled also increases. So it is a case of direct variation, where increase in one quantity, also results in increase in other quantity. So we use here formula for direct variation to calculate the distance travelled in 285 min.

Let the distance travelled in 285 min be x km.

It is a case of direct variation.

⟹ x₁/y₁ = x₂/y₂

Here,

• x₁ = 112
• y₁ = 90
• x₂ = x
• y₂ = 285

➤ 112/90 = x/285

➤ 112 × 285 = 90 × x

➤ 112 × 285 = 90x

➤ x = (112 × 285)/90

➤ x = 31920/90

➤ x = 354.67

∴ Distance travelled in 285 min = 354.67 km