When the rate is Rs 210 per piece, a certain sum of money can buy 16 pieces of Tshirts. If the rate increases to Rs. 280 per piece, how many pieces of T-shirts
can be bought with the sum?​

12 pieces of T-shirts can be bought with the sum.

Step-by-step explanation:

Given that:

The rate is Rs 210 per piece, a certain sum of money can buy 16 pieces of T-shirts.

To Find:

If the rate increases to Rs. 280 per piece, how many pieces of T-shirts can be bought with the sum?

Let us assume:

x pieces of T-shirts can be bought with the sum.

Finding the number of T-shirts bought:

According to the question.

Rate × Pieces of T-shirts = Rate × Pieces of T-shirts

⟶ 210 × 16 = 280 × x

⟶ 3360 = 280x

⟶ x = 3360/28

⟶ x = 12

Hence,

If the rate increases to Rs. 280 per piece, 12 pieces of T-shirts can be bought with the sum.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )