The anount of extension in an elastic spring varies directly with the weight hung on it, If a weight of 250 gm produces an extension of 3.5 cm, find the extension produced by the wight of 700 gm.

A worker is paid Rs 200 for 8 days work. If he works for 20 days, how much will he get?

The anount of extension in an elastic string varies directly as the weight hung on it. If a weight of 150 gm produces an extension of 2.9 cm, then what weight would produce an extension of 17.4 cm?

In 10 days, the earth picks up pounds of dust from the atmosphere. How much dust will it pick up in 45 days?

In 15 days, the earth picks up kg of dust from the atmosphere. In how many days it will pick up kg of dust?