Fill in the blank

(i) By Inverse proportion

3 × 4 = 4 × (no. of days required)

(No. of days required) = = 3 days

(ii) By Inverse proportion

5 × 144 = 6 × (time required)

(Time required) = = 120 minutes

(iii) By Inverse proportion

90 minutes × 60 km/hr = 45 km/hr × (time taken in minutes)

(No. of days required) = = 120 minutes = 2 hours

(iv) More the oranges more will be the cost. So it is a direct proportion.

Let the cost be Rs x,

⇒ 8 × x = 20.80 × 5

x = = Rs 13

(v) More the no. of sheets more will be the weight of them. So it is a direct proportion.

Let the no. of sheets be x,

50 × x = 500 × 12

x = = 120 sheets