Two years ago the ages of Radha and Meena were in the ratio 5 : 2. If the sum of their present ages is 39 years, their ages, 2 years ago, were :

1. 27 years and 12 years

2. 17 years and 22 years

3. 25 years and 10 years

4. 11 years and 28 years

The perimeter of a rectangular field is 28 m and its area is 40 sq. m. Its sides are :

1. 8 m and 6 m

2. 4 m and 10 m

3. 10 m and 6 m

4. 3 m and 11 m

If the width of the uniform shaded portion is x m; its area in terms of x is :

1. 320 m² - (16 - 2x)(20 - 2x) m²

2. 320 m² - (16 - x)(20 - x) m²

3. 320 m² - (16 - 2x)(20 - x) m²

4. 320 m² - (16 - x)(20 - 2x) m²

The speed of a boat is 32 km/h. If the speed of stream is 8 km/h, the speed of the boat upstream is :

1. 36km/h

2. 40 km/h

3. 16 km/h

4. 24 km/h