## What is Grafting?

Updated on 10-Oct-2022 09:46:02
Grafting is a horticultural technique in which tissues of plants are joined so as to continue their growth together. The upper part of one plant, also known as the scion, is joined to the lower part, called the rootstock, of another plantIt is done to fulfil a variety of purposes like to repair injured trees, to produce dwarf trees and shrubs, to strengthen plants' resistance to certain diseases, to retain varietal characteristics, to adapt varieties to adverse soil or climatic conditions, to ensure pollination, to produce more trees in a short period of time.Below is an image of different methods ... Read More

## 1. Sonu buys 40 kg of wheat at Rs 12.50 per kg and 30 kg of wheat at Rs 14 per kg. At what rate per kg should he sell the mixture to gain 5% on the whole?2. Wasim bought two cricket bats for Rs. 840 and Rs. 360 respectively. He sells the first bat at a gain of 15% and the second one at a loss of 5%. Find his gain or loss per cent in the whole transaction.

Updated on 10-Oct-2022 09:46:02

## Explain why a rectangle is a convex quadrilateral.

Updated on 10-Oct-2022 09:45:52
Solution:A convex polygon is a simple polygon (not self-intersecting) in which no line segment between any two points on the boundary ever goes outside the polygon. This applies to quadrilaterals also as they are also polygons with four sides.  A rectangle is a quadrilateral as it has four sides. A rectangle is a convex quadrilateral because no line segment between any two points on its boundary goes outside the rectangle. No diagonal of a rectangle lies outside the rectangle.

## Which age marked the use of metals?

Updated on 10-Oct-2022 09:45:51
The Metal Age is divided into three stages: the Copper Age, the Bronze Age and the Iron Age.During the Metal Ages, people made a variety of metal objects.