Question

1. The compound interest on Rs. 800 invested for 2 years at the rate of 10 pc pa is Rs.
a) 800
dy 1680
b) 8800
c) 9680
2. 1 acre is nearly
a) 0.5 hectare bro 4 hectare c) 0.2 hectare d) 1 hectare
3) if the side of the cube is 10 cm, then its volume is
a) 10 litres b) 100 litres
c) 1 litre
d) 0.1 litre
4. The chords corresponding to congruent acres are
a) Corresponding
b) Congruent c) Chords
d) Same​

Answer 1

[1] (a) - 800✔

[2] Ans :- 0.4 hectare✔

[3] Ans :- Given a = 10cm

Volume of cube = a³=10×10×10=1000cm³= 1 litre

Radius,r = 10.5cm

Volume of sphere = 4/3πr³=4/3×22/7×10.5×10.5×10.5= 4851cm³

1000cm³=1 litre

1000cm³×4.851= 1 litre×4.581

4851cm³=4.851 litres

Therefore, the spherical container can contain more than 4.5 litres but less than 5 litres

.

[4] (b) :- Congruent chords are equidistant from the center of a circle. If two chords in a circle are congruent, then their intercepted arcs are congruent.